POSC Specifications
Version 3.0
Epicentre Standard Values
earth_feature_class

earth_feature_class

Standard Instance Values

identifier naming _system description parent _class source _reference source version status
  naming _system .identifier   earth _feature _class .identifier     ref _version .identifier  
lithostratigraphic unit POSC stratigraphic feature A defined body of sedimentary, extrusive, igneous, metasedimentary, or metavolcanic strata that is distinguished and delimited on the basis of lithic characteristics and stratigraphic position.     POSC epicentre 3.0 current
supergroup POSC stratigraphic feature A lithostratigraphic unit, ranking above group, that identifies a group of contiguous formations and groups having some unifying characteristic. lithostratigraphic unit   POSC epicentre 3.0 current
group POSC stratigraphic feature The lithostratigraphic rank above formation, comprising a sequence of contiguous associated formations with significant unifying lithologic features. lithostratigraphic unit   POSC epicentre 3.0 current
formation POSC stratigraphic feature The primary formal unit of lithostratigraphic classification. It is intermediate in rank and is informally defined as a mappable rock body characterized by a distinctive lithology. lithostratigraphic unit   POSC epicentre 3.0 current
member POSC stratigraphic feature Member is the lithostratigraphic rank below formation, characterized by a distinctive lithology within a formation. lithostratigraphic unit   POSC epicentre 3.0 current
bed POSC stratigraphic feature The lowest ranking unit of lithostratigraphic classification, a bed is a lithologically distinctive rock body within a member or formation. lithostratigraphic unit   POSC epicentre 3.0 current
biozone POSC stratigraphic feature The feature is classified as having distinctive fossil content.     POSC epicentre 3.0 current
abundance zone POSC stratigraphic feature A biozone characterized by quantitatively distinctive maxima of relative abundance of one or more taxa. It is essentially the same as acme zone. biozone API Glossary of Geology POSC epicentre 3.0 current
interval zone POSC stratigraphic feature The biozone between two specified, documented lowest and/or highest occurrences of single taxa. Three basic types are recognized: taxon range zone, concurrent range zone, and lineage zone. biozone API Glossary of Geology POSC epicentre 3.0 current
taxon range zone POSC stratigraphic feature The interval zone between the documented lowest and highest occurrences of a single taxon. interval zone API Glossary of Geology POSC epicentre 3.0 current
concurrent range zone POSC stratigraphic feature The interval zone included between the documented lowest occurrence of one taxon and the documented highest occurrence of another taxon, resulting in stratigraphic overlap of the two taxa. interval zone API Glossary of Geology POSC epicentre 3.0 current
lineage zone POSC stratigraphic feature The interval zone between successive documented lowest occurrences within an evolutionalry lineage. interval zone API Glossary of Geology POSC epicentre 3.0 current
assemblage zone POSC stratigraphic feature A biozone characterized by the association of three or more taxa. It may be based on all kinds of fossils present, or restricted to only certain kinds of fossils. It may consist of a geographically or stratigraphically restricted assemblage, or may incorporate two or more contemporaneous assemblages with shared characteristic taxa. The assemblage zone is named from one or more of the fossils particularly representative of the assemblage. biozone API Glossary of Geology POSC epicentre 3.0 current
stratigraphic boundary POSC geologic boundary The feature is a stratigraphic boundary, although the specific type of boundary is not given.     POSC epicentre 3.0 current
lithohorizon POSC geologic boundary The surface is a lithostratigraphic change or of distinctive lithostratigraphic character. It is valuable for correlation. It is generally a boundary of a lithostratigraphic unit, but may be a thin marker bed. stratigraphic boundary API Glossary of Geology POSC epicentre 3.0 current
biohorizon POSC geologic boundary The feature marks a boundary between biozones. The boundary may be transitional, but is generally considered to be a single horizon. stratigraphic boundary API Glossary of Geology POSC epicentre 3.0 current
chronohorizon POSC geologic boundary The feature is a stratigraphic surface or interface that is everywhere of the same age. stratigraphic boundary API Glossary of Geology POSC epicentre 3.0 current
airport SDTS A facility, either on land or water, where aircraft can take off and land; usually consists of hard-surfaced landing strips, a control tower, hangars, and accommodations for passengers and cargo.   Spatial Data Transfer Standard POSC epicentre 2.1 current
antenna SDTS A metallic apparatus for sending and receiving electro-magnetic waves.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
antenna array SDTS A group of directional antennas.   Spatial Data Transfer Standard POSC epicentre 2.1 current
approachway SDTS The airspace through which aircraft approach or leave a landing area.   Spatial Data Transfer Standard POSC epicentre 2.1 current
arch SDTS A curved structure that supports the weight of material over an open space.   Spatial Data Transfer Standard POSC epicentre 2.1 current
backwater SDTS An area of calm water unaffected by the current of a stream.   Spatial Data Transfer Standard POSC epicentre 2.1 current
bar SDTS A submerged or emerged mound, ridge, or succession of ridges of sand or other material extending across the bottom, and which may obstruct navigation.   Spatial Data Transfer Standard POSC epicentre 2.1 current
basin SDTS Any bowl-shaped depression in the surface of the land or ocean floor.   Spatial Data Transfer Standard POSC epicentre 2.1 current
bay SDTS This value is deprecated. The SDTS considers -inlet- to be the proper choice for a bay. Use inlet.   Spatial Data Transfer Standard POSC epicentre 2.2 deprecated
beach SDTS The gently sloping shore which is washed by waves or tides, especially the parts covered by sand or pebbles.   Spatial Data Transfer Standard POSC epicentre 2.1 current
beacon SDTS A fixed signal, mark, or light and associated facilities erected for the guidance of mariners or airplane pilots.   Spatial Data Transfer Standard POSC epicentre 2.1 current
berth SDTS The place where a ship lies when at anchor secured to a pier or wharf.   Spatial Data Transfer Standard POSC epicentre 2.1 current
bottom SDTS The portion of the ground surface which lies below water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
boundary SDTS A nonphysical line indicating the limit or extent of an area or territory.   Spatial Data Transfer Standard POSC epicentre 2.1 current
breakers SDTS A zone or region of waves breaking into foam as they advance toward the shore.   Spatial Data Transfer Standard POSC epicentre 2.1 current
breakwater SDTS A structure built to break the force of waves so as to protect a beach, harbor, or other waterfront facility.   Spatial Data Transfer Standard POSC epicentre 2.1 current
bridge SDTS A structure erected over a depression or obstacle to carry traffic or some facility such as a pipeline.   Spatial Data Transfer Standard POSC epicentre 2.1 current
bridge superstructure SDTS Those elements of the bridge structure which are above the uppermost deck.   Spatial Data Transfer Standard POSC epicentre 2.1 current
building SDTS A permanent walled and roofed construction.   Spatial Data Transfer Standard POSC epicentre 2.1 current
building complex SDTS A group of buildings and associated facilities functioning together as a unit.   Spatial Data Transfer Standard POSC epicentre 2.1 current
buoy SDTS A float moored or anchored in water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cableway SDTS A conveyor system in which carrier units run on wire cables string between supports.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
campground SDTS The ground or area on which tents, huts, etc., are erected for temporary shelter.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cape SDTS A relatively extensive land area jutting into a water body, which prominently marks a change in or interrupts notably the coastal trend of that water body.   Spatial Data Transfer Standard POSC epicentre 2.1 current
catchment SDTS An area drained by a single watercourse; a natural drainage area which may coincide with a river basin, in which the divides direct the water from the rainfall and percolation into a river. However, where underground flow is involved, the catchment may be larger or smaller than that that may be apparent from the surface relief.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cave SDTS Naturally formed, subterranean open area or chamber.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cemetery SDTS A place for burying the dead.   Spatial Data Transfer Standard POSC epicentre 2.1 current
chimney SDTS A structure containing a passage or flue for discharging smoke and gases from combustion.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cirque SDTS A deep natural hollow near the crest of a mountain.   Spatial Data Transfer Standard POSC epicentre 2.1 current
clearing SDTS An open area in a forest.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cliff SDTS A high, steep, or overhanging face of rock.   Spatial Data Transfer Standard POSC epicentre 2.1 current
coast SDTS The general region of indefinite width that extends from the sea inland to the first major change in terrain features.   Spatial Data Transfer Standard POSC epicentre 2.1 current
continent SDTS One of the large, unbroken masses of land into which the Earth's surface is divided.   Spatial Data Transfer Standard POSC epicentre 2.1 current
control point SDTS A point of known location.   Spatial Data Transfer Standard POSC epicentre 2.1 current
crater SDTS Circular-shaped depression at the summit of a volcanic cone or on the surface of the land.   Spatial Data Transfer Standard POSC epicentre 2.1 current
crevasse SDTS A deep fissure in snow or ice.   Spatial Data Transfer Standard POSC epicentre 2.1 current
crib SDTS A crate-like construction of logs or beams, usually filled with stones, placed in water as a free standing mooring device or as the foundation of a pier or wharf.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cropland SDTS Land that has been plowed or otherwise cultivated.   Spatial Data Transfer Standard POSC epicentre 2.1 current
cut SDTS An excavation of the Earth's surface to provide passage for a road, railway, canal, etc.   Spatial Data Transfer Standard POSC epicentre 2.1 current
dam SDTS A barrier constructed across a watercourse to control the flow or raise the level of water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
delta SDTS A tract of alluvium formed at the mouth of a river where the deposition of some of its load exceeds its rate of removal, crossed by the divergent channels (distributaries) of the river.   Spatial Data Transfer Standard POSC epicentre 2.1 current
demilitarized zone SDTS An area in which military activity is prohibited.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
desert SDTS A region rendered barren or partially barren by environmental extremes, especially by low rainfall.   Spatial Data Transfer Standard POSC epicentre 2.1 current
dry dock SDTS An artificial basin fitted with gate or caisson into which a vessel may be floated and from which the water may be pumped out to expose the bottom of the vessel.   Spatial Data Transfer Standard POSC epicentre 2.1 current
dumping ground SDTS Area designated for dumping various types of materials.   Spatial Data Transfer Standard POSC epicentre 2.1 current
earth surface SDTS The outermost surface of the land and waters of the planet.   Spatial Data Transfer Standard POSC epicentre 2.1 current
embankment SDTS A raised structure of earth, ground, etc.   Spatial Data Transfer Standard POSC epicentre 2.1 current
exhibition ground SDTS A public area containing buildings, paddocks, etc., for the display of livestock, agricultural produce, machinery, etc.   Spatial Data Transfer Standard POSC epicentre 2.1 current
farm SDTS A tract of crop or grazing land, as well as the group of buildings with and often surrounding a farmhouse, including barns, sheds, and other outbuildings, used for agricultural production.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fault SDTS A fracture in the Earth's crust with displacement on one side of the fracture relative to the other.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fence SDTS An enclosure or barrier made of wire, rails, slats or other relatively light material, as opposed to a wall which is of stone or other heavy material.   Spatial Data Transfer Standard POSC epicentre 2.1 current
filtration beds SDTS An area containing layers of material used to filter or aerate water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fish hatchery SDTS A facility used for the spawning of fish which are subsequently used to stock lakes and streams.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fish ladder SDTS A facility consisting of a series of small pools each one slightly higher than the preceding, built around a dam to enable fish to make their way upstream.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fish trap SDTS A device used to catch fish.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fishing ground SDTS A water area in which fishing is frequently carried on.   Spatial Data Transfer Standard POSC epicentre 2.1 current
flat SDTS A level tract lying at a small depth below the surface of water, or alternately covered and left bare by the tide.   Spatial Data Transfer Standard POSC epicentre 2.1 current
flood plain SDTS An area which is subject to periodic flooding.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ford SDTS The shallow part of a river which can be easily crossed.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fort SDTS A fortified place or position.   Spatial Data Transfer Standard POSC epicentre 2.1 current
fumarole SDTS A hole in the Earth's crust from which steam and gases are emitted.   Spatial Data Transfer Standard POSC epicentre 2.1 current
gantry SDTS A frame structure raised on side supports so as to span over or around something.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
gap SDTS Low point or opening between hills or mountains or in a ridge or mountain range.   Spatial Data Transfer Standard POSC epicentre 2.1 current
gate SDTS A structure that may be swung, drawn, or lowered to block an entrance or passageway.   Spatial Data Transfer Standard POSC epicentre 2.1 current
geologic zone SDTS An area of geologic significance, such as a fault or fracture zone, that is not otherwise classified.   Spatial Data Transfer Standard POSC epicentre 2.1 current
geyser SDTS An intermittent fountain of hot water ejected with force from a hole in the Earth's crust.   Spatial Data Transfer Standard POSC epicentre 2.1 current
golf course SDTS An area set out for the playing of golf.   Spatial Data Transfer Standard POSC epicentre 2.1 current
grandstand SDTS A usually roofed structure for viewing events and having tiers of seats for spectators.   Spatial Data Transfer Standard POSC epicentre 2.1 current
grassland SDTS An uncultivated area of grass or grass-like vegetation.   Spatial Data Transfer Standard POSC epicentre 2.1 current
grave SDTS A place within a graveyard used for burial.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ground SDTS The solid portion of the Earth up to and including the ground surface.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ground surface SDTS The land surface of the Earth, both exposed and underwater.   Spatial Data Transfer Standard POSC epicentre 2.1 current
guard rail SDTS A strong fence or barrier to prevent vehicles from leaving the roadway, or for people's safety.   Spatial Data Transfer Standard POSC epicentre 2.1 current
harbor SDTS An area of water where ships, planes or other watercraft can anchor or dock.   Spatial Data Transfer Standard POSC epicentre 2.1 current
headwaters SDTS The upper part of a river system, denoting the upper basin and source streams of a river.   Spatial Data Transfer Standard POSC epicentre 2.1 current
hedge SDTS A dense growth of shrubbery planted as a fence or boundary.   Spatial Data Transfer Standard POSC epicentre 2.1 current
helipad SDTS A transportation structure used for the landing of helicopters.   Spatial Data Transfer Standard POSC epicentre 2.1 current
hopper SDTS A top loading funnel-shaped structure for temporary storage of loose materials which will be dispensed from its bottom.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ice field SDTS Large area of permanent sea or land ice.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ice rink SDTS A surface of ice for ice skating.   Spatial Data Transfer Standard POSC epicentre 2.1 current
iceberg SDTS A large mass of detached land ice in the sea or stranded in shallow water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
indian reservation SDTS An area set aside for the use of an indian tribe or tribes.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
inlet SDTS An opening of the sea into the land, or of a lake into its shore.   Spatial Data Transfer Standard POSC epicentre 2.1 current
inshore traffic SDTS A designated area between the landward boundary of a   Spatial Data Transfer Standard POSC epicentre 2.1 current
zone SDTS traffic separation scheme and the adjacent coast, intended for local traffic.   Spatial Data Transfer Standard POSC epicentre 2.1 current
intersection SDTS The junction of roads or tracks.   Spatial Data Transfer Standard POSC epicentre 2.1 current
irrigation system SDTS A system designed to supply land with water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
island SDTS Area of dry or relatively dry land surrounded by water or low wetland.   Spatial Data Transfer Standard POSC epicentre 2.1 current
island cluster SDTS A group of islands.   Spatial Data Transfer Standard POSC epicentre 2.1 current
isthmus SDTS Narrow section of land in a body of water connecting two larger land areas.   Spatial Data Transfer Standard POSC epicentre 2.1 current
lagoon SDTS A sheet of salt water separated from the open sea by sand or shingle banks. The sheet of water between an offshore reef, esp. of coral and mainland. The sheet of water within a ring or horseshoe shaped atoll.   Spatial Data Transfer Standard POSC epicentre 2.1 current
lake SDTS Any standard body of inland water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
landing place SDTS A place for loading and unloading passengers or cargo to and from water vessels.   Spatial Data Transfer Standard POSC epicentre 2.1 current
lane SDTS A prescribed course for ships or aircraft, or a strip delineated on a road to accommodate a single line of automobiles; not to be confused with the road itself.   Spatial Data Transfer Standard POSC epicentre 2.1 current
launching ramp SDTS A transportation structure used for launching boats.   Spatial Data Transfer Standard POSC epicentre 2.1 current
lock SDTS An enclosure in a water body with gates at each end to raise or lower vessels as they pass from one level to another.   Spatial Data Transfer Standard POSC epicentre 2.1 current
marina SDTS A harbor facility for recreational craft where supplies, repairs, and various services are available.   Spatial Data Transfer Standard POSC epicentre 2.1 current
military base SDTS An area owned and operated by the government in which various military activities take place.   Spatial Data Transfer Standard POSC epicentre 2.1 current
military bunker SDTS A military strong point, usually part of an extensive fortification.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mine SDTS An excavation in the Earth for the purpose of extracting earth materials.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mine field SDTS An area where explosive mines have been anchored or sunk in water or buried on land.   Spatial Data Transfer Standard POSC epicentre 2.1 current
missile site SDTS An area for housing and launching guided missiles.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
mobile home SDTS A trailer that is a permanent dwelling and is designed without a permanent foundation.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mobile home park SDTS An area maintained for the parking of inhabited mobile homes.   Spatial Data Transfer Standard POSC epicentre 2.1 current
monument SDTS A structure erected as a memorial.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mooring SDTS The place where a craft may be secured to the ground, wharf, pier, post, or buoy.   Spatial Data Transfer Standard POSC epicentre 2.1 current
moraine SDTS An accumulation of boulders, stones, or other debris carried and deposited by a glacier.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mount SDTS A mountain or hill.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mount range SDTS A series of connected and aligned mountains or mountain ridges.   Spatial Data Transfer Standard POSC epicentre 2.1 current
mouth SDTS The exit or point of discharge of a stream into another stream, lake or sea.   Spatial Data Transfer Standard POSC epicentre 2.1 current
oasis SDTS A small, isolated, fertile or green area in a desert region, usually having a spring or well.   Spatial Data Transfer Standard POSC epicentre 2.1 current
off road vehicular area SDTS An area for the testing of, or use by, vehicles that are designed to travel across the terrain.   Spatial Data Transfer Standard POSC epicentre 2.1 current
offshore platform SDTS A raised surface located in a sea.   Spatial Data Transfer Standard POSC epicentre 2.1 current
oil field SDTS An area where petroleum is or was removed from the Earth.   Spatial Data Transfer Standard POSC epicentre 2.1 current
outdoor theater SDTS An outdoor area consisting of a stage or other focal point, and an area where the audience can be seated.   Spatial Data Transfer Standard POSC epicentre 2.1 current
overfalls SDTS Short breaking waves occurring when a current passes over a shoal or other submarine obstruction or meets a contrary current or wind.   Spatial Data Transfer Standard POSC epicentre 2.1 current
overrun/stopway SDTS An area beyond the take-off runway able to support an airplane during an aborted take-off.   Spatial Data Transfer Standard POSC epicentre 2.1 current
park SDTS A place or area set aside for recreation or preservation of a cultural or natural resource.   Spatial Data Transfer Standard POSC epicentre 2.1 current
parking area SDTS An area set aside for the parking of motor vehicles.   Spatial Data Transfer Standard POSC epicentre 2.1 current
peak SDTS The summit of a mountain.   Spatial Data Transfer Standard POSC epicentre 2.1 current
peninsula SDTS A body of land jutting out into and nearly surrounded by water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
pier SDTS A structure built out into the water, usually with its greatest dimension at right angles to the shore, forming a landing place or a place alongside which vessels can lie.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
piling SDTS A set of posts forced into the earth to serve as a support, as for a pier, or to resist lateral pressure.   Spatial Data Transfer Standard POSC epicentre 2.1 current
pilot waters SDTS Areas in which the services of a marine pilot are essential.   Spatial Data Transfer Standard POSC epicentre 2.1 current
pinnacle SDTS A tall, slender, spire-shaped rock projecting from a level or more gently sloping surface.   Spatial Data Transfer Standard POSC epicentre 2.1 current
place SDTS An area with definite or indefinite boundaries.   Spatial Data Transfer Standard POSC epicentre 2.1 current
plain SDTS A region of general uniform slope, comparatively level, and of considerable extent.   Spatial Data Transfer Standard POSC epicentre 2.1 current
plateau SDTS An elevated and comparatively level expanse of land.   Spatial Data Transfer Standard POSC epicentre 2.1 current
plunge pool SDTS A hollow eroded by the force of the falling water at the base of a waterfall, particularly by the eddying effect.   Spatial Data Transfer Standard POSC epicentre 2.1 current
polyna SDTS Any enclosed water area in pack ice other than a lead, not large enough to be called open water. When frozen over, a polyna becomes an ice skylight from the point of view of the submariner. Also called BIG CLEARING, CLEARING, GLADE, ICE CLEARING, POOL, REGIONAL CLEARING.   Spatial Data Transfer Standard POSC epicentre 2.1 current
port SDTS A landing place provided with terminal and transfer facilities for loading and discharging cargo or passengers, usually located in a harbor.   Spatial Data Transfer Standard POSC epicentre 2.1 current
post SDTS A long relatively slender, and generally round piece of wood or other material.   Spatial Data Transfer Standard POSC epicentre 2.1 current
pump out facility SDTS A holding place where ship's bilges and cargo are pumped.   Spatial Data Transfer Standard POSC epicentre 2.1 current
pyramid SDTS An ancient structure having a broad base with sides narrowing towards the top.   Spatial Data Transfer Standard POSC epicentre 2.1 current
quicksand SDTS A bed of loose sand mixed with water forming a soft, shifting mass that yields easily to pressure.   Spatial Data Transfer Standard POSC epicentre 2.1 current
racetrack SDTS A course laid out for racing.   Spatial Data Transfer Standard POSC epicentre 2.1 current
radar dome SDTS A dome shaped structure used to protect the antenna of a radar installation.   Spatial Data Transfer Standard POSC epicentre 2.1 current
radar reflector SDTS A device capable of or intended for reflecting radar signals.   Spatial Data Transfer Standard POSC epicentre 2.1 current
railway SDTS A permanent way having one or more rails which provides a track for cars.   Spatial Data Transfer Standard POSC epicentre 2.1 current
railway yard SDTS An area provided with a system of tracks where railroad trains are made up and cars are switched, stored, or serviced.   Spatial Data Transfer Standard POSC epicentre 2.1 current
rapids SDTS An area of broken, fast flowing water in a stream, where the slope of the bed increases (but without a prominent break of slope which might result in a waterfall), or where a gently dipping bar of harder rock outcrops.   Spatial Data Transfer Standard POSC epicentre 2.1 current
reef SDTS A ridge of rocks, lying near the surface of the sea, which may be visible at low tide, but is usually covered by water.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
refueling track SDTS Airspace designated for conducting aerial refueling.   Spatial Data Transfer Standard POSC epicentre 2.1 current
reserve SDTS A tract of land set aside for a specific use.   Spatial Data Transfer Standard POSC epicentre 2.1 current
restricted area SDTS An area of air, land, or water in which travel or other activities are subject to specified conditions or constraints.   Spatial Data Transfer Standard POSC epicentre 2.1 current
revetment SDTS A facing, other than a wall, of stone, concrete, wood, etc., built to sustain an embankment.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ridge SDTS A long and narrow upland with steep sides.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ridge line SDTS The line separating drainage basins.   Spatial Data Transfer Standard POSC epicentre 2.1 current
rig SDTS Vertical structure fitted for drilling or lifting operations.   Spatial Data Transfer Standard POSC epicentre 2.1 current
road SDTS An open way for the passage of vehicles, persons, or animals on land.   Spatial Data Transfer Standard POSC epicentre 2.1 current
rock SDTS An isolated rocky formation or a single large stone, usually one constituting a danger to navigation. It may be always submerged, always uncovered, or alternately covered and uncovered by the tide.   Spatial Data Transfer Standard POSC epicentre 2.1 current
roundabout SDTS Area of water subject to a routing measure restricting ship movement to a counter-clockwise direction.   Spatial Data Transfer Standard POSC epicentre 2.1 current
runway SDTS A straight path used for landing, taxiing, and take-off of aircraft.   Spatial Data Transfer Standard POSC epicentre 2.1 current
salt pan SDTS An area of salt deposits.   Spatial Data Transfer Standard POSC epicentre 2.1 current
sea SDTS The great body of salt water of the oceans.   Spatial Data Transfer Standard POSC epicentre 2.1 current
seamount SDTS An elevation of the sea floor, 1000 m or higher, that remains covered by water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
shaft SDTS A long narrow passage sunk in the earth.   Spatial Data Transfer Standard POSC epicentre 2.1 current
shingle SDTS A collection of loose pebbles on the shore of the sea or a lake.   Spatial Data Transfer Standard POSC epicentre 2.1 current
shipyard SDTS A yard or area where ships are built or repaired.   Spatial Data Transfer Standard POSC epicentre 2.1 current
shore SDTS That part of the land in immediate contact with a body of water including the area between high and low water lines.   Spatial Data Transfer Standard POSC epicentre 2.1 current
shoreline SDTS The line of contact between a body of water and the land.   Spatial Data Transfer Standard POSC epicentre 2.1 current
sign SDTS A roadway associated feature which provides information to people passing.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
ski area SDTS An area used for skiing.   Spatial Data Transfer Standard POSC epicentre 2.1 current
ski jump SDTS A ramp used for ski jumping.   Spatial Data Transfer Standard POSC epicentre 2.1 current
snag SDTS A stem or trunk of a tree above or below the surface of the water.   Spatial Data Transfer Standard POSC epicentre 2.1 current
snowfield SDTS A region of permanent snow in mountainous areas or high latitudes.   Spatial Data Transfer Standard POSC epicentre 2.1 current
solar panel SDTS A unit of solar cells for converting sunlight into electrical energy or heat.   Spatial Data Transfer Standard POSC epicentre 2.1 current
sports field SDTS A field on which sporting activities are carried out.   Spatial Data Transfer Standard POSC epicentre 2.1 current
spring SDTS The place where water issues from the ground naturally.   Spatial Data Transfer Standard POSC epicentre 2.1 current
stadium SDTS Large often unroofed structure in which athletic events are held.   Spatial Data Transfer Standard POSC epicentre 2.1 current
stockyard SDTS An enclosed area in which livestock are temporarily kept.   Spatial Data Transfer Standard POSC epicentre 2.1 current
subcontinent SDTS A extensive land area composed of one or more countries that are of continent size.   Spatial Data Transfer Standard POSC epicentre 2.1 current
swash SDTS The mass of broken foaming water which rushes bodily up a beach as a wave breaks.   Spatial Data Transfer Standard POSC epicentre 2.1 current
talus SDTS Slopes of broken rock debris on a mountainside.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tank SDTS A structure used for the storage of fluids.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tennis court SDTS A recreational area used for playing tennis.   Spatial Data Transfer Standard POSC epicentre 2.1 current
terrace SDTS A step-like feature between higher and lower ground: a relatively flat or gently inclined shelf of earth, backed and fronted by steep slopes or man-made retaining walls.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tidal gauge SDTS An instrument for measuring the height of the tide.   Spatial Data Transfer Standard POSC epicentre 2.1 current
time zone SDTS A geographic region within which the same standard time is used.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tower SDTS A tall framework or structure, the elevation of which is functional.   Spatial Data Transfer Standard POSC epicentre 2.1 current
traffic separation scheme SDTS Area of water with lanes designated to separate opposing streams of vessel traffic.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tree SDTS A woody perennial plant, having a self-supporting main stem or trunk.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
trough SDTS A long depression of the sea floor.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tundra SDTS A treeless area poleward or upward of the tree line of arctic or alpine regions, having a permanently frozen subsoil and supporting low-growing vegetation such as lichens, mosses, and stunted shrubs.   Spatial Data Transfer Standard POSC epicentre 2.1 current
tunnel SDTS An underground or underwater passage.   Spatial Data Transfer Standard POSC epicentre 2.1 current
turning basin SDTS A water area used for turning vessels.   Spatial Data Transfer Standard POSC epicentre 2.1 current
turntable SDTS A circular horizontal rotating platform equipped with a railway track, used for turning locomotives, as in a roundhouse.   Spatial Data Transfer Standard POSC epicentre 2.1 current
utility SDTS A linear distribution system consisting of pipelines, high tension wires, cables, etc., providing a public service and usually subject to government regulations.   Spatial Data Transfer Standard POSC epicentre 2.1 current
valley SDTS A long, narrow depression in the Earth's surface, usually with a fairly regular downslope.   Spatial Data Transfer Standard POSC epicentre 2.1 current
wall SDTS An upright structure of masonry, wood, plaster, or other building material serving to enclose, divide, or protect an area.   Spatial Data Transfer Standard POSC epicentre 2.1 current
watercourse SDTS A way or course through which water may or does flow.   Spatial Data Transfer Standard POSC epicentre 2.1 current
waterfall SDTS A sudden descent of water over a step or ledge in the bed of a river.   Spatial Data Transfer Standard POSC epicentre 2.1 current
water surface SDTS The water portion of the Earth's surface, including the surface of sea and inland waters.   Spatial Data Transfer Standard POSC epicentre 2.1 current
watering place SDTS A place other than a spring or well where vessels and vehicles replenish their water supply.   Spatial Data Transfer Standard POSC epicentre 2.1 current
well SDTS A pit or hole dug or bored into the earth, for the extraction of oil, water, other fluids or gases.   Spatial Data Transfer Standard POSC epicentre 2.1 current
wetland SDTS A vegetated area that is inundated or saturated by surface or groundwater.   Spatial Data Transfer Standard POSC epicentre 2.1 current
wharf SDTS A structure extending parallel to the shoreline so that vessels may lie close alongside to receive and discharge cargo.   Spatial Data Transfer Standard POSC epicentre 2.1 current
wind indicator SDTS A visual device used to provide wind information.   Spatial Data Transfer Standard POSC epicentre 2.1 current
windbreak SDTS A shelter, either natural (e.g., a line of trees or a thick hedge) or artificial (a screen), which breaks or interrupts the force of the wind.   Spatial Data Transfer Standard POSC epicentre 2.1 current
windmill SDTS A mill or other machine that runs on the energy generated by a wheel of adjustable blades or flats rotated by the wind.   Spatial Data Transfer Standard POSC epicentre 2.1 current
woodland SDTS Land having a cover of trees, shrubs, or both.   Spatial Data Transfer Standard POSC epicentre 2.1 current
wreck SDTS A wrecked vessel, either submerged or visible, which is attached to or foul of the bottom or cast up on the shore.   Spatial Data Transfer Standard POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
zone of occupation SDTS An area, usually temporary, held and controlled by a foreign military force.   Spatial Data Transfer Standard POSC epicentre 2.1 current
seismic vertex POSC seismic location A point that is used as a reference in a seismic experiment.     POSC epicentre 3.0 current
seismic station POSC seismic location The vertex represents a node of the grid defined by attribute seismic station uid in the associated geometry set. This will typically be used for "fixed cable" recording. seismic vertex   POSC epicentre 2.2 current
source event POSC seismic location The vertex represents a node of the grid defined by attribute source event uid in the associated geometry set. This will typically be used for "moving cable" recording. seismic vertex   POSC epicentre 2.2 current
seismic geometry POSC seismic location The earth feature is a geometry description related to a seismic experiment.     POSC epicentre 3.0 current
3d survey POSC seismic location The acquisition of the data is over an area, in which the midpoints of the shot-receiver pairs are closely enough spaced areally that the spatial resolution is acceptably small in any surface direction. Generally, the bin node geometry is defined in two independent directions, and the bin nodes are indexed with two independent indexes. seismic geometry   POSC epicentre 2.1 current
derived 3d survey POSC seismic location The original intent of the acquisition data was not to generate a 3d survey. However, the seismic lines are close enogh together to be able to treat the data as though it were so acquired. In general, the spatial resolution is not as consistent as a 3d survey, and not as small in the crossline direction. seismic geometry   POSC epicentre 2.1 current
2d survey POSC seismic location A collection of 2d lines, grouped together for a specific purpose. seismic geometry   POSC epicentre 2.1 current
2d line POSC seismic location Data for which the midpoints of the source receiver locations fall along a line. It is not necessary for that the sources and receivers fall along the same line as the bin nodes, nor that the lines be straight. seismic geometry   POSC epicentre 2.1 current
uphole survey POSC seismic location An acquisition in which the sources are buried, and the measurement is the one-way travel time from the source to a receiver at the surface. The purpose is to measure the near surface velocity structure. seismic geometry   POSC epicentre 2.1 current
swath POSC seismic location A type of 3d survey used in land seismic in which the layout of the geophones is generally perpendicular to the geometry of the source positions. seismic geometry   POSC epicentre 2.1 current
binset POSC seismic location A set of earth locations, generally regularly spaced, which represents the location of a trace for interpretation. These points are also known as CDP locations or bin centers. For a 2d line, this is a usually regularly spaced set of points which can be indexed by a single index value. For a 3d survey, this is a grid of locations, indexed by a pair of indexes. seismic geometry   POSC epicentre 2.1 current
source line POSC seismic location A line of indexed locations representing the locations of source events. A multistreamer marine survey may generate more than one source line for each sail line. seismic geometry   POSC epicentre 2.1 current
receiver line POSC seismic location A line of indexed locations representing the locations of receiver events. A single marine cable, because of feathering, may generate a pattern of receiver positions. However this is to be considered a single receiver line. A multistreamer marine survey may generate more than one receiver line for each sail line if there are parallel receiver cables. For a VSP, the receiver line is a set of downhole locations. A crosswell survey may have more than one receiver line. seismic geometry   POSC epicentre 2.1 current
sail line POSC seismic location A sail line is the set of locations of a reference point, such as the boat antenna, of a marine survey. A circular sail pattern may or may not generate more than one sail line, depending on the intent of the acquisition. seismic geometry   POSC epicentre 2.1 current
preplot line POSC seismic location A preplot line is the planned sail line. seismic geometry   POSC epicentre 2.1 current
refraction survey POSC seismic location A seismic program whose intent is to map geologic structure by using head waves. seismic geometry   POSC epicentre 2.1 current
checkshot survey POSC seismic location The seismic receivers are located downhole. The intent is to measure direct travel time from the surface to the downhole receiver. seismic geometry   POSC epicentre 2.1 current
derived 2d survey POSC seismic location For example, array simulation using kilochannel data. seismic geometry   POSC epicentre 2.1 current
VSP POSC seismic location The sources are located at or near the surface, and the receivers are located in a well. seismic geometry   POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
crosswell survey POSC seismic location The sources are located in one or more wells, and the receivers are located in one or more wells. Any single shot must have a set of receivers in a different well from the shot. seismic geometry   POSC epicentre 2.1 current
binset geometry POSC seismic location The earth feature is a geometry for a binset related to a seismic experiment.     POSC epicentre 3.0 current
irregular POSC seismic location Indicates that the nominal distances are truly nominal because the locations do not define a regular grid or line. binset geometry   POSC epicentre 2.1 current
regular POSC seismic location Indicates that all lines are straight and parallel and all nodes on the lines are equally spaced. The corner points of the grid can be used to define the geodetic locations. For a line, indicates that the line is straight and all nodes are equally spaced. binset geometry   POSC epicentre 2.1 current
regular inline POSC seismic location Indicates that the lines are not straight, but distances between nodes are equal in the projected coordinate system. binset geometry   POSC epicentre 2.1 current
regular geodetic POSC seismic location Indicates a straight 2d line which has nodes that are equally spaced in the geodetic coordinate system versus the projected coordinate system. binset geometry   POSC epicentre 2.1 current
regular VSP POSC seismic location The bin nodes are regularly spaced downhole. The wellbore path is considered to be the inline direction. binset geometry   POSC epicentre 2.1 current
irregular VSP POSC seismic location The bin nodes are irregularly spaced downhole. The wellbore path is considered to be the inline direction. binset geometry   POSC epicentre 2.1 current
regular crooked line POSC seismic location Indicates that the points along the line are regularly spaced, but the line is not straight. binset geometry   POSC epicentre 2.1 current
survey environment POSC seismic location The earth feature in which a seismic survey is collected is characterized by the environment, such as land or marine.     POSC epicentre 3.0 current
land POSC seismic location General non-marine, continental environment. survey environment   POSC epicentre 2.1 current
marine POSC seismic location Environment of ocean basins and the inland seas connected with the ocean basins. survey environment   POSC epicentre 2.1 current
marine with crosscurrent POSC seismic location A marine environment with a cross current that causes the cable to drift at an angle to the seismic line. This results in an echelon of successive spread positions that resembles one sied of a feather. The practical result of this is that the receiver of each recorded trace is at a unique position. marine   POSC epicentre 2.1 current
transitional POSC seismic location Environment in areas where the influence of both land and marine conditions occur. survey environment   POSC epicentre 2.1 current
desert POSC seismic location Environment in a region devoid from vegetation and scarcely populated. land   POSC epicentre 2.1 current
fresh water POSC seismic location Marine environment of fresh water lakes. marine   POSC epicentre 2.1 current
swamp POSC seismic location Area of saturated ground supporting trees, shrubs and grasses. survey environment   POSC epicentre 2.1 current
permafrost POSC seismic location Area underlain by a permafrost layer. land   POSC epicentre 2.1 current
regulatory POSC field A field that is legally defined and recognized by the regulatory body for the area in which the field resides. The spatial boundaries of the field may be arbitrarily drawn relative to a geologic definition of the field.     POSC epicentre 2.1 current
commercial POSC field A field whose definition is specified by a technical data vendor who supplies information about some aspect of the field. May be at odds with the regulatory or geologic definition of the field.     POSC epicentre 2.1 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
geologic POSC field A field that is based on a geologic model of the subsurface. The spatial boundaries of the field may be different from those defined by the regulatory body for the area in which the field resides.     POSC epicentre 2.1 current
arbitrary POSC field A field whose spatial limits are arbitrarily drawn without regard to the geologic or regulatory definition of the field.     POSC epicentre 2.1 current
anticline POSC structural feature A structural fold in which the core contains older rocks and is generally concave down.   PIDD POSC epicentre 2.2 current
antiform POSC structural feature A structural fold whose limbs close upward in strata for which the stratigraphic sequence is unknown. anticline PIDD POSC epicentre 2.2 current
anticlinorium POSC structural feature A major anticlinal structural fold that is composed of many smaller folds. anticline Structural Geology POSC epicentre 2.2 current
arch POSC structural feature A broad, generally circular structural fold in which the core contains older rocks and is generally concave down. anticline   POSC epicentre 2.2 current
geanticline POSC structural feature A broad anticlinal uplift, hundreds of miles long and tens of miles wide. anticline Structural Geology POSC epicentre 2.2 current
syncline POSC structural feature A structural fold in which the core contains younger rocks and is generally concave up.   PIDD POSC epicentre 2.2 current
synform POSC structural feature A structural fold whose limbs close downward in strata for which the stratigraphic sequence is unknown. syncline PIDD POSC epicentre 2.2 current
geosyncline POSC structural feature A broad synclinal depression, hundreds of miles long and tens of miles wide. syncline Structural Geology POSC epicentre 2.2 current
fold POSC structural fold A curve or end of a planar structure such as rock strat, bedding planes, foliage, or cleavage.   API Glossary of Geology POSC epicentre 3.0 current
overturned fold POSC structural feature A structural fold where the axial plane is inclined and where both limbs dip in the same direction. fold Structural Geology POSC epicentre 2.2 current
recumbent fold POSC structural feature A structural fold where the axial plane is essentially horizontal and where one limb has been completely overturned. fold Structural Geology POSC epicentre 2.2 current
isoclinal fold POSC structural feature A structural fold where the two limbs dip at equal angles, parallel in the same direction. fold Structural Geology POSC epicentre 2.2 current
chevron fold POSC structural feature A structural fold where the hinges are sharp and angular. fold Structural Geology POSC epicentre 2.2 current
box fold POSC structural feature A structural fold where the crest is broad and flat; two hinges are present, one on either side of the flat crest. fold Structural Geology POSC epicentre 2.2 current
fan fold POSC structural feature A structural fold where both limbs are overturned. fold Structural Geology POSC epicentre 2.2 current
kink band POSC structural feature A narrow band in which the beds assume a dip that is steeper or gentler than that in adjacent beds.   Structural Geology POSC epicentre 2.2 current
monocline POSC structural feature A structural fold in relatively flat strata where the strata locally assumes a steeper dip before leveling back out flat, at a significantly different elevation.   Structural Geology POSC epicentre 2.2 current
homocline POSC structural feature An area where the strata dips in one direction at a relatively uniform angle.   Structural Geology POSC epicentre 2.2 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
structural terrace POSC structural feature An area where dipping strata locally assume a horizontal attitude.   Structural Geology POSC epicentre 2.2 current
drag fold POSC structural feature A structural fold that forms when a competent bed slides past an incompetent bed. The axial plane of the drag is inclined at an angle to the perpendicular of the bed. fold Structural Geology POSC epicentre 2.2 current
diapir fold POSC structural feature A structural anticlinal fold where the mobile core of the anticline has broke through the more brittle overlying strata. fold Structural Geology POSC epicentre 2.2 current
joint POSC structural feature A surface of fracture or parting in a rock, without displacement. The surface is usually plane, and often occurs with parallel joints to form part of a joint set.   API Glossary of Geology POSC epicentre 3.0 current
joint set POSC structural feature A group of more or less parallel joints. joint Structural Geology POSC epicentre 2.2 current
joint system POSC structural feature Two or more joint sets or any group of joints in a characteristic pattern. joint Structural Geology POSC epicentre 2.2 current
strike joint POSC structural feature A joint that strikes essentially parallel to the strike of the bedding of the strata. joint Structural Geology POSC epicentre 2.2 current
dip joint POSC structural feature A joint that strikes essentially parallel to the dip of the bedding of the strata. joint Structural Geology POSC epicentre 2.2 current
bedding joint POSC structural feature A joint that lies parallel to the bedding of the strata. joint Structural Geology POSC epicentre 2.2 current
extension joint POSC structural feature A joint that forms with a strike perpendicular to the axis of a fold. joint Structural Geology POSC epicentre 2.2 current
release joint POSC structural feature A joint that forms with a strike parallel to the axis of a fold. joint Structural Geology POSC epicentre 2.2 current
fault POSC structural feature A fracture or zone of fractures along which there has been displacement of the sides relative to one another.   API Glossary of Geology POSC epicentre 3.0 current
normal fault POSC structural feature A dip-slip fault in which the hanging wall appears to have moved downward relative to the footwall; also called a gravity fault. fault PIDD POSC epicentre 2.2 current
detachment fault POSC structural feature A low-angle, normal fault resulting in the downward movement of strata from a relatively uplifted region. normal fault Structural Geology POSC epicentre 2.2 current
antithetic fault POSC structural feature A secondary fault that dips towards its primary, with displacement in the down dip (normal) direction. normal fault Structural Geology POSC epicentre 2.2 current
reverse fault POSC structural feature A dip-slip fault in which the hanging wall appears to have moved up relative to the footwall. fault PIDD POSC epicentre 2.2 current
thrust fault POSC structural feature A reverse fault in which the fault plane is less than 45 degrees from the horizontal, such that the upper block is thrust over the lower. reverse fault PIDD POSC epicentre 2.2 current
overthrust fault POSC structural feature A thrust fault in which the fault plane is less that 10 degrees from the horizontal, with a large net slip. thrust fault Structural Geology POSC epicentre 2.2 current
klippe POSC structural feature A remnant of an overthrust sheet, now isolated by erosion.   Structural Geology POSC epicentre 2.2 current
fenster POSC structural feature An exposure by erosion of the strata underlying a thrust.   Structural Geology POSC epicentre 2.2 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
nappe POSC structural feature A large thrust sheet or recumbent fold.   Structural Geology POSC epicentre 2.2 current
graben POSC structural feature A down-dropped block between two normal faults.   PIDD POSC epicentre 2.2 current
trough POSC structural feature A graben-like structure resulting from the down-faulting or down-warping of an area.     POSC epicentre 2.2 current
basin POSC structural feature A general term for a area that due to relative downward faulting or warping forms a closed sedimentary system.     POSC epicentre 2.2 current
horst POSC structural feature The ridge left standing between two grabens or down dropped faults.   PIDD POSC epicentre 2.2 current
platform POSC structural feature A horst-like structure resulting from the up-faulting or up-warping of a region.     POSC epicentre 2.2 current
shield POSC structural feature The portion of a tectonic plate covered by a thick, relatively tectonically stable layer of continental crust.     POSC epicentre 2.2 current
strike-slip fault POSC structural feature A fault in which the movement of the fault blocks is parallel to the fault's strike; also called a wrench fault. fault PIDD POSC epicentre 2.2 current
right-slip fault POSC structural feature A strike-slip fault where the opposite wall moved relatively to the right. strike-slip fault Structural Geology POSC epicentre 2.2 current
left-slip fault POSC structural feature A strike-slip fault where the opposite wall moved relatively to the left. strike-slip fault Structural Geology POSC epicentre 2.2 current
transcurrent fault POSC structural feature A strike-slip fault traversing folds or other structural features. strike-slip fault Structural Geology POSC epicentre 2.2 current
displacement zone POSC structural feature A zone of complex strike-slip faulting.     POSC epicentre 2.2 current
terrane POSC structural feature A zone of complex structural deformation arising from a particular set of tectonic events.     POSC epicentre 2.2 current
diapir POSC structural feature The injection of mobile strata from depth into overlying strata. The body generally cuts across the adjacent strata, but locally may be concordant.   Structural Geology POSC epicentre 2.2 current
salt diapir POSC structural feature The injection of halite from depth into overlying strata. There is a complete gradation from individual, mature, jet-like stocks to irregular, immature massifs having diameters measured in the tens of kilometers. The symmetry of the diapirs is variable with some being capped asymmetric to symmetric bulbs. diapir Structural Concepts POSC epicentre 2.2 current
salt anticline POSC structural feature The upwarping of sediments due to the migration of halite as a result of differential sediment loading. These structures, whose lengths measure in the tens to hundreds of kilometers usually lie parallel to regional strike. anticline Structural Concepts POSC epicentre 2.2 current
salt wall POSC structural feature The injection of halite from depth into overlying strata along lines parallel to regional strike. These structures lengths measure in the tens to hundreds of kilometers.   Structural Concepts POSC epicentre 2.2 current
salt pillow POSC structural feature A limited form of salt diapirism, occurring in areas where the source salt is to thin too allow the formation of true diapirs.   Structural Concepts POSC epicentre 2.2 current
detached salt diapir POSC structural feature A salt diapir that has become separated from its root source of halite. salt diapir Structural Concepts POSC epicentre 2.2 current
salt withdrawal POSC structural feature A synclinal feature formed by the removal of underlying halite, with coincidental subsidence of the overlying strata into the resulting void. syncline Structural Concepts POSC epicentre 2.2 current

earth_feature_class

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identifier naming _system description parent _class source _reference source version status
suture zone POSC structural feature A complex structural terrain resulting from the collision of two continental margins.     POSC epicentre 2.2 current
subduction zone POSC structural feature A complex structural terrain resulting from the downwarping of one tectonic plate under another.     POSC epicentre 2.2 current
rift margin POSC structural feature A large, generally normally-faulted structure resulting from the pulling apart of a tectonic plate.     POSC epicentre 2.2 current
failed rift POSC structural feature A large graben-like structure resulting from incomplete rifting of a tectonic plate.     POSC epicentre 2.2 current

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