Curve Mnemonic Dictionary

Depositional environments

Code	Name	Parent Code	Description
AEOL_FLUV	Aeolian Fluvial Environment	AEOL	An environment of deposition from rivers or relatively large streams in the Aeolian environment
AEOL_LAKE	Aeolian Lake/Lacustrine Environment	AEOL	Inland water body in the Aeolian environment
AEOL_WADI_SBKH	Aeolian Wadi/Sabkha Environment	AEOL	Salt-flat in the Aeolian environment
AEOL	Aeolian/Eolian Environment	SILC_CLST	Environment characterized by eroding, transporting, and depositing wind activity.
ALUV_FAN	Alluvial Fan Environment	ALUV_SEDM	A sloping, fan-shaped body of coarse material deposited by a stream at the place where it emerges from an upland into a broad valley or a plain.
ALUV_FLPL	Alluvial Flood Plain/Basins Environment	ALUV_SEDM	A strip of relatively flat land bordering an alluvial stream, underlain by overbank deposits.
ALUV_SEDM	Alluvial Sediments Environment	CONT	An environment of deposition from a river or stream.
ALUV_SWMP	Alluvial Swamp Environment	ALUV_SEDM	Area around alluvial stream of water-saturated ground supporting trees, shrubs and grasses.
TRANS_INSL_AMLG_CHNL	Amalgamated Channels Environment	TRANS_DEEP_NOFAN_INSL	High density stacking of channels in the deep water intraslope basin environment.
TRANS_INSL_AMLG_SHEET	Amalgamated Sheets Environment	TRANS_DEEP_NOFAN_INSL	High density stacking of sheet deposits in the deep water intraslope basin environment.
ANST_ABND_CHNL	Anastomosed Abandoned Channel Environment	ANST	An anastomosed channel which is no longer active, but may be filled with deposits.
ANST_CHNL	Anastomosed Channel Environment	ANST	An anastomosed river channel.
ANST_CRVS_CHNL	Anastomosed Crevasse Channel Environment	ANST	Small channel cutting across the levee of an anastomosed channel.
ANST_CRVS_SPLAY	Anastomosed Crevasse Splay Environment	ANST	An environment of deposition by outwash from a break through the levee of the outer bend of an anastomosed channel.
ANST	Anastomosed Environment	ALUV_SEDM	Multi-channel rivers that have relatively low gradients, deep and narrow channels, and stable banks
ANST_LEVEE	Anastomosed Levee Environment	ANST	A raised embankment deposited along the shore of an anastomosed channel.
CARB_BACK_REEF	Back Reef Environment	CARB_REEF	Lagoon side back of the carbonate reef core.
TRANS_BARR_BACK_SHORE	Barrier Island Backshore Environment	TRANS_BARR	The seaward portion of a barrier coast that lies above the high tide level and in front of the barrier crest.
TRANS_BARR_BEACH	Barrier Island Beach Environment	TRANS_BARR	The seaward portion of a barrier coast that lies between low and high tide levels, characterized by temporary accumulations of sand.
TRANS_BARR_EBB_DELTA	Barrier Island Ebb Tidal Delta Environment	TRANS_BARR	Small delta forming on the seaward side of a barrier island, deposited in the falling water portion of the tidal cycle
TRANS_BARR_FLOOD_DELTA	Barrier Island Flood Tidal Delta Environment	TRANS_BARR	Small delta forming on the landward side of a barrier island, deposited in the rising water portion of the tidal cycle
TRANS_BARR_LAGN	Barrier Island Lagoon Environment	TRANS_BARR	A shallow body of salt or brackish water, partly or completely separated from a sea or lake by a barrier island.
TRANS_BARR_MARSH	Barrier Island Marsh/Swamp Environment	TRANS_BARR	Periodically wet or continually flooded flats in the barrier coast zone with the surface very shallowly submerged; covered dominantly with sedges, cattails, rushes, or other hydrophytic plants.
TRANS_BARR_MUD_FLAT	Barrier Island Mud Flat Environment	TRANS_BARR	Relatively level area of fine grained material in a barrier coast, alternately covered and uncovered by the tide or covered by shallow water, and barren of vegetation.
TRANS_BARR_TIDAL_CHNL	Barrier Island Tidal Channel Environment	TRANS_BARR	Transverse channel across a barrier island, which permits water to sweep in and out of the lagoon.
TRANS_BARR_WASH_FAN	Barrier Island Washover Fan Environment	TRANS_BARR	A fan-like deposit of sand washed over a barrier island during a storm.
TRANS_BARR	Barrier Island/Strand Plain Environment	TRANS_RIVER_DELTA	Ridge of sand paralleling the shoreline and extending above sea level only slightly.
CARB_REEF_CREST_BARR	Barrier Reef Environment	CARB_REEF_CREST	A reef that lies some distance from a continental coast or volcanic island, shielding a lagoon of open water from a few hundred feet to several miles wide lies between the reef and the mainland.
MARN_BASIN_CNTR	Basin Center Environment	MARN	The deep center region of a marine basin.
MARN_BASIN_MRGN	Basin Margin Environment	MARN	The marginal region of a marine basin.
TRANS_DEEP_NOFAN_BASIN	Basin Plain Environment	TRANS_DEEP_NOFAN	A deep marine basin far separated from coastal or submarine fan processes.
TRANS_BAY_HEAD_DELTA	Bay Head Delta Environment	TRANS_ESTU	A delta formed where a river enters an estuarine bay.
TRANS_BAY_LAGN	Bay/Bay Lagoon Environment	TRANS_ESTU	A shallow body of salt or brackish water in an estuary, partly or completely separated from the sea by barrier islands.
TRANS_BEACH_BACK_SHORE	Beach Backshore Environment	TRANS_BARR_BEACH	The portion of a beach that lies between the mean high-tide level and the zone of sand dunes or undisturbed vegetation.
TRANS_BEACH_BERM	Beach Berm/Coastal Dune Environment	TRANS_BARR_BEACH	A low, impermanent, nearly horizontal or landward-sloping shelf, ledge, or narrow terrace on the backshore of a barrier beach, deposited by storm waves.
TRANS_BEACH_FORE_SHORE	Beach Foreshore Environment	TRANS_BARR_BEACH	The portion of a beach between the mean high and low tide levels.
TRANS_BRAID_DELTA	Braid Delta Environment	TRANS	A delta with multiple channels that interweave as a result of repeated bifurcation and convergence of flow around inter-channel bars.
BRAID_GRVL	Braided Gravelly Environment	BRAID_STRM	A braided stream characterized by excessive deposition of gravel.
BRAID_SAND	Braided Sandy Environment	BRAID_STRM	A braided stream characterized by excessive deposition of sand.
BRAID_STRM	Braided Streams Environment	ALUV_SEDM	A stream characterized by excessive deposition of sand and/or gravel bars so that water flows in many branching and reuniting channels.
CARB	Carbonate Environment	ENVI	Environment characterized by deposition of carbonates sediments either biologically or chemically.
CARB_SLOPE	Carbonate Slope Environment	CARB	Sloped outer portion of a carbonate platform or shelf that descends into deep water.
CARB_TIDAL_FLAT	Carbonate Tidal Flat Environment	CARB	A broad, flat region of muddy carbonate sedimentation, covered and uncovered in each tidal cycle.
TRANS_CHEN_PLAIN	Chenier Plain Environment	TRANS_RIVER_DELTA	A mud-rich strand plain, occupied by cheniers and intervening mud-flats with marsh and swamp vegetation.
BRAID_CHUT_BAR	Chute Bar Environment	BRAID_SAND	A bar deposited in chute-like shape in a sandy braided stream.
TRANS_BARR_COAST_DUNE	Coastal Dune/Berm Environment	TRANS_BARR	A small terrace in the backshore area of the barrier coast with its terrace facing seaward.
TRANS_COAST_PLAIN	Coastal Plain Environment	TRANS	A low, broad plain that has as its lower margin an oceanic shore and its strata horizontal or gently dipping toward the sea, and generally represents an area of recently prograded continental sediment.
TRANS_DEEP_FAN_CHNL	Deep Fan Channel Environment	TRANS_DEEP_FAN	Channel in the deep water fan environment.
TRANS_DEEP_FAN_DEBR	Deep Fan Debris Flow Environment	TRANS_DEEP_FAN	A sediment gravity flow in which fine sediment and fluids support large particles in a deep water fan.
TRANS_DEEP_FAN_LEVEE	Deep Fan Levee Environment	TRANS_DEEP_FAN	A long, broad low ridge or embankment of sediments beside and parallel to a fan channel in a deep water fan.
TRANS_DEEP_FAN_LOBE	Deep Fan Lobe Environment	TRANS_DEEP_FAN	A contiguous deposit in a deep water fan within a localized area, bounded by converging stratigraphic surfaces at the distal extremity of the fan.
TRANS_DEEP_FAN_OVBA	Deep Fan Overbank Environment	TRANS_DEEP_FAN	A level, low-lying area adjacent to streams that is periodically flooded by stream water in the deep fan environment.
TRANS_DEEP_FAN_TRANS	Deep Fan Transition Environment	TRANS_DEEP_FAN	Portion of the deep fan environment at the outermost limit of influence of continental conditions.
DEEP_LAKE	Deep Lake Environment	LAKE	A lake having subenvironments segregated by depth.
TRANS_DEEP_WATER	Deep Water Environment	TRANS	An offshore environment where water depths exceed approximately 600 feet [200 m], the approximate water depth at the edge of the continental shelf
TRANS_DELTA_FRONT	Delta Front Environment	TRANS_RIVER_DELTA	The seaward portion of a river delta, sloping downward into the basin at an angle steeper the delta plain.
TRANS_TIDAL_MARSH	Delta Marsh/Swamp Environment	TRANS_RIVER_TIDAL	a Periodically wet or continually flooded area around a tidal stream, of saturated to shallowly submerged ground supporting trees, shrubs and grasses.
TRANS_MOUTH_BAR	Delta Mouth Bar Environment	TRANS_RIVER_DELTA	Sand bars deposited at the mouth of a distributary channel in the river delta environment.
TRANS_DELTA_PLAIN	Delta Plain Environment	TRANS_RIVER_DELTA	The level or nearly level portion of a river delta; a flood plain characterized by repeated channel bifurcation and divergence, multiple distributary channels, and interdistributary flood basins.
TRANS_SPLAY	Delta Splay Environment	TRANS_RIVER_DELTA	A flat area of deposition of outwash material from breaks in the channel levees in a river delta.
TRANS_RIVER_DELTA	Deltaic/River Delta Environment	TRANS	An environment of deposition at the mouth of a river, where flow velocity decreases as it enters a body of standing water.
TRANS_DEEP_DSTL_LEVEE	Distal Fan Levee Environment	TRANS_DEEP_FAN_LEVEE	A long, broad low ridge or embankment of sediments beside and parallel to a fan channel in the distal portion of a deep water fan.
TRANS_DEEP_DSTL_FAN	Distal/Lower Fan Environment	TRANS_DEEP_FAN	The portion of a deep water fan formed farthest from the source area.
TRANS_DIST_CHNL	Distributary Channel Environment	TRANS_RIVER_DELTA	A river branch that flows away from a main channel and does not rejoin it in the river delta environment.
DUNE_BRCH	Dune Barchan Environment	DUNE	A crescent-shaped sand dune with horns pointing downwind.
DUNE_DOME	Dune Dome Environment	DUNE	Mound of sand that is circular or elliptical in shape, with no slip-faces; may be formed by the modification of stationary barchans.
DUNE	Dune Environment	AEOL	A heap of sand or other loose sediment accumulated by wind.
DUNE_LINR_SEIF	Dune Linear/Seif Environment	DUNE_LONG	A large, sharp-crested, longitudinal dune or chain of sand dunes. If unmodified, the crest, in profile, commonly consists of a succession of curved slip faces produced by strong, but infrequent cross winds.
DUNE_LONG	Dune Longitudinal Environment	DUNE	A long dune parallel to the direction of the prevailing wind.
DUNE_PARBL	Dune Parabolic Environment	DUNE	A sand dune with a long, scoop-shaped form, convex in the downwind direction so that its horns point upwind, whose ground plan, when perfectly developed, approximates the form of a parabola.
DUNE_SHEET	Dune Sheet Environment	DUNE	A large, irregularly shaped, commonly thin, surficial mantle of eolian sand, lacking the discernible slip faces that are common on dunes.
DUNE_STAR	Dune Star Environment	DUNE	Large pyramidal or star-shaped dune with three or more sinuous radiating ridges from a central peak of sand. This dune has 3 or more slip faces. Produced by variable winds. This dune does not migrate along the ground, but does grow vertically.
DUNE_STRK	Dune Streak Environment	DUNE	A dune of fine mineral dust.
DUNE_TRNV	Dune Transverse Environment	DUNE	A very asymmetric sand dune elongated perpendicular to the prevailing wind direction, having a gentle windward slope and a steep leeward slope standing at or near the angle of repose of sand; it generally forms in areas of sparse vegetation.
ENVI	Environment		The sum of all the effects of external conditions (physical, chemical and biological) on sedimentary deposits.
TRANS_FLUV_CHNL	Estuarine Fluvial Channel Environment	TRANS_ESTU	A major passageway or conduit for the flow of water through the uppermost landward portion of the estuary environment.
TRANS_FLUV_OVBK	Estuarine Fluvial Overbank/Fluvial Floodplain Environment	TRANS_ESTU	A level, low-lying land area adjacent to an estuary, that is periodically flooded.
TRANS_FLUV_POINT_BAR	Estuarine Fluvial Point Bar Environment	TRANS_ESTU	A sand bar deposited by lateral accretion on the inner shore of a meander loop in the uppermost landward portion of the estuary environment.
TRANS_FLUV_SPLAY	Estuarine Fluvial Splay Environment	TRANS_ESTU	An outwash of material from crevasse channels on the outer bend of a fluvial channel in the uppermost landward portion of the estuary environment.
TRANS_ESTU_POINT_BAR	Estuarine Point Bar Environment	TRANS_ESTU	A sand bar deposited by lateral accretion on the inner shore of a meander loop of an estuary, showing indications of tidal fluctuation.
TRANS_ESTU_TIDAL_BAR	Estuarine Tidal Bar Environment	TRANS_ESTU	A longitudinal sand bar in the funnel portion of an estuary, influenced by tidal fluctuation.
TRANS_ESTU_TIDAL_INLET	Estuarine Tidal Inlet Environment	TRANS_ESTU	A transverse channel across a barrier island or jetty at the mouth of an estuary, which permits water to sweep in and out.
TRANS_ESTU	Estuary/Estuarine Environment	TRANS_RIVER_DELTA	The mouth of a flooded river valley, usually depositing fine-grained sediments in the brackish water .
TRANS_DEEP_FAN	Fan Environment	TRANS_DEEP_WATER	A deep-water, cone- or fan-shaped body of clastic sediment located seaward of large river deltas or submarine canyons.
TRANS_FAN_DELTA	Fan-Delta Environment	TRANS	A body of alluvium, nearly flat and fan-shaped, deposited at or near the mouth of a mountain canyon where it enters a body of relatively quiet water.
CARB_FORE_REEF	Fore Reef Environment	CARB_REEF	Ocean side front of the carbonate reef core.
CARB_REEF_CREST_FRNG	Fringing Reef Environment	CARB_REEF_CREST	A reef that is closely attached to the shore. There is no lagoon or open water between the reef and the land upon which it is attached.
GLCL	Glacial Environment	SILC_CLST	Environment in area affected by a glacier.
TRANS_INCS_VALY	Incised Valley Environment	TRANS	A valley developed by rejuvenated erosion downward into the substrate, beginning at the coastline and progressing upstream.
TRANS_INTER_DIST_BAY	Interdistributary Bay Environment	TRANS_RIVER_DELTA	Open areas of shallow water within an active delta between interdistributary channels.
INTER_DUNE_DEPR	Interdune Depression Environment	INTER_DUNE	Relatively sunken part of the interdune.
INTER_DUNE	Interdune Environment	AEOL	The relatively flat surface, whether sand-free or sand-covered, between dunes.
TRANS_INSL_LEVEE	Intraslope Levee Environment	TRANS_DEEP_NOFAN_INSL	An embankment of sediments deposited along the shore of a channel in the deep water intraslope basin environment.
TRANS_INSL_OVBK	Intraslope Overbank Environment	TRANS_DEEP_NOFAN_INSL	A level area of fine-grained deposition adjacent to intraslope channels formed by flow escaping from channel levees.
TRANS_DEEP_NOFAN_INSL	Intraslope/Ponded Basin Environment	TRANS_DEEP_NOFAN	An environment of deposition within an intraslope depression in deep water not associated with a submarine fan.
LAKE_DELTA	Lake Delta Environment	LAKE	A prograding body of sediment formed at the mouth of a stream coming into a lake.
LAKE_MUD_FLAT	Lake Mudflat Environment	LAKE	A flat area of mud deposition at the shore of a lake.
LAKE_PLAYA	Lake Playa Environment	LAKE	A level or nearly level area that occupies the lowest part of a completely closed lake basin and that is covered with water at irregular intervals of distance and time, forming a temporary lake.
LAKE_SHRE	Lake Shoreline Environment	LAKE	The environment at the junction of land with a lake.
LAKE	Lake/Lacustrine Environment	CONT	Lake environment.
BRAID_LONG_BAR	Longitudinal Bar Environment	BRAID_SAND	A sand bar deposited in longitudinal orientation in a sandy braided stream.
TRANS_SHLW_LOWER_SHORE	Lower Shoreface Environment	TRANS_SHLW_SHORE	The lower part of the zone of marine coastline between mean low-tide level and normal wave base, offshore from the zone of longshore bars.
MARN	Marine Evaporites/Arid Shorelines And Basins Environment	ENVI	Environments of deposition from sea water.
MNDR_ABND_CHNL	Meandering Abandoned Channel Environment	MNDR	A meandering channel which is no longer active, but only contains standing water or sediment fill.
MNDR_CHNL	Meandering Channel Environment	MNDR	The major fluvial channel in a meandering channel environment.
MNDR_CRVS_CHNL	Meandering Crevasse Channel Environment	MNDR	A small channel cutting across the levee of a meandering channel
MNDR_CRVS_SPLAY	Meandering Crevasse Splay Environment	MNDR	An environment of deposition of outwash material from crevasse channels on the outer bend of a meandering channel
MNDR	Meandering Environment	ALUV_SEDM	A fluvial environment in which channels are shaped like a series of somewhat regular, loop-like bends.
MNDR_LEVEE	Meandering Levee Environment	MNDR	An embankment along the outer shore of a meandering channel loop, formed by overbank flow
MNDR_OXBOW_LAKE	Meandering Oxbow Lake	MNDR	The abandoned bow-shaped or horseshoe-shaped part of a former meander loop.
MNDR_POINT_BAR	Meandering Point Bar Environment	MNDR	A sand bar deposited by lateral accretion on the inner shore of a meandering channel loop
TRANS_SHLW_MIDL_SHORE	Middle Shoreface Environment	TRANS_SHLW_SHORE	The middle part of the zone of marine coastline between mean low-tide level and normal wave base, in the zone of longshore bars.
TRANS_DEEP_MIDL_FAN	Middle/Mid/Medial Fan Environment	TRANS_DEEP_FAN	Middle portion of a deep water fan, which is dominated by thick proximal sandstone turbidites separated by thin mudstones.
CARB_MOUND	Mound Environment	CARB	A body of carbonate sediment shaped like a low rounded hill built by colonial organisms.
TRANS_DEEP_NOFAN	Non-Fan Environment	TRANS_DEEP_WATER	A deep water environment which is not associated with a submarine fan.
CONT	Nonmarine/Continental Environment	SILC_CLST	Broad geological term which includes all environments occurring on the surface of continents, i.e. non-marine.
TRANS_SHLW_OFF_SHORE	Offshore Environment	TRANS_SHLW_WATER	A shallow water environment situated offshore on the continental shelf.
TRANS_SHLW_TRANS_OFSH	Offshore-Transition Environment	TRANS_SHLW_WATER	The portion of coastline between normal and storm wave base.
CARB_REEF_CREST_PINA	Pinnacle Reef Environment	CARB_REEF_CREST	A tall, roughly cylindrical mass of carbonate reef.
TRANS_PRO_DELTA	Prodelta Environment	TRANS_RIVER_DELTA	An environment of deposition seaward of the main delta body in the river delta environment.
TRANS_DEEP_PROX_LEVEE	Proximal Fan Levee Environment	TRANS_DEEP_FAN_LEVEE	Embankments of sand adjacent to a submarine channel in the upper, inner portion of a deep water fan.
TRANS_DEEP_PROX_FAN	Proximal/Upper Fan Environment	TRANS_DEEP_FAN	Upper, inner portion of a deep water fan, near the sediment supply, usually depositing coarse, channelized debris flows.
CARB_RAMP	Ramp Environment	CARB	An environment of carbonate deposition sloping gently seaward from the foot of the shore face caused by sediments retreating toward the basin.
TRANS_DEEP_NOFAN_RAMP	Ramp/Platform Environment	TRANS_DEEP_NOFAN	A siliciclastic depositional environment sloping evenly seaward from the shoreface, not associated with a submarine fan.
CARB_REEF_CREST	Reef Crest Environment	CARB_REEF	The part of the reef where waves break.
CARB_REEF	Reef Environment	CARB	Environment in which frame-building organisms producea a raised, subaqueous, shore-parallel ridge on the shallow continental shelf.
CARB_REEF_LAGN	Reef Lagoon Environment	CARB_REEF	A shallow sound, channel, pond, or lake separated from the sea by a carbonate reef.
CARB_RIM_SHELF	Rimmed Shelf Environment	CARB	A relatively flat, shallowly submerged platform or shelf of carbonate deposits with an abrupt, steep edge.
CARB_SABKA	Sabkha Environment	CARB	Flat environment of carbonate deposition at or slightly above mean high tide level.
MARN_SABKA	Sabkha Environment	MARN	A wide area of marine flats bordering a lagoon. Evaporite minerals are formed in such areas.
SHLW_LAKE	Shallow Lake Environment	LAKE	A lake which of shallow depth in which subenvironments are segregated laterlly.
TRANS_SHLW_WATER	Shallow Water Environment	TRANS	An environment located in water depths less than approximately 300 feet [100 m].
TRANS_INSL_LAYR_SHEET	Sheet/Layered Sheets Environment	TRANS_DEEP_NOFAN_INSL	A large, irregularly shaped, commonly thin, surficial mantle of sand in the deep water intraslope basin environment.
TRANS_SHLW_SHORE	Shoreface Environment	TRANS_SHLW_WATER	The zone of shoreline between mean water level and wave base.
SILC_CLST	Siliciclastic Environment	ENVI	Sedimentary environment characterized by silicic deposits, generally sand and shale.
TRANS_DEEP_NOFAN_SLOPE	Slope Environment	TRANS_DEEP_NOFAN	An environment of deposition on the continental slope far separated from coastal processes.
TRANS_DEEP_NOFAN_SLUMP	Slump/Mass Transport Complex Environment	TRANS_DEEP_NOFAN	A deep submarine landslide characterized by the downward slipping of one or more masses of rock or unconsolidated debris along lystric slip surfaces.
TRANS_DEEP_NOFAN_CANY	Submarine Canyon Environment	TRANS_DEEP_NOFAN	An environment of deposition in a submarine canyon.
TRANS_DEEP_NOFAN_DEBR	Submarine Debris Flow Environment	TRANS_DEEP_NOFAN	A sediment gravity flow in which fine sediment and fluids support large particles in deep water not associated with a submarine fan.
TRANS_DELTA_TIDAL_CHNL	Tidal Channel Environment	TRANS_RIVER_DELTA	A channel in a river delta, which permits water flow to sweep in and out of tidal lagoons.
TRANS_RIVER_TIDAL_CHNL	Tidal Delta Channel Environment	TRANS_RIVER_TIDAL	A channel across a tidal delta, which permits water to sweep in and out of an estuary.
TRANS_RIVER_TIDAL	Tidal Delta Environment	TRANS_RIVER_DELTA	A delta formed at the mouth of an estuary, dominated by tidal processes.
TRANS_TIDAL_MIXED_FLAT	Tidal Delta Mixed Sand/Mud Flat Environment	TRANS_RIVER_TIDAL	A flat region of muddy and sandy mixed sediment, covered and uncovered in each tidal cycle in the tidal river delta environment.
TRANS_TIDAL_MUD_FLAT	Tidal Delta Mud Flat Environment	TRANS_RIVER_TIDAL	A flat region of muddy sediment, covered and uncovered in each tidal cycle in the tidal river delta environment.
TRANS_TIDAL_SAND_FLAT	Tidal Delta Sand Flat Environment	TRANS_RIVER_TIDAL	A flat region of sandy sediment, covered and uncovered in each tidal cycle in the tidal river delta environment.
TRANS_TIDAL_SAND_RIDGE	Tidal Sand Ridge Environment	TRANS_RIVER_TIDAL	A large-scale, low, subaqueous ridge of sand parallel to tidal flow in the tidal river delta or tidal shelf environment, that stretches over wide areas of the seabed and is formed in conditions of strong tidal currents.
TRANS_DELTA_SAND_RIDGE	Tidal Sand Ridge Environment	TRANS_RIVER_DELTA	A large-scale, low, subaqueous, ridge of sand, formed parallel to tidal flow on a shallow shelf in the tide-dominated delta environment.
TRANS_TIDAL_SAND_WAVE	Tidal Sandwave Environment	TRANS_RIVER_TIDAL	A large transverse bar in the deeper water region of the tidal river delta environment, caused by storms and tidal currents.
TRANS	Transitional Coasts/Paralic Environment	ENVI	Environment in areas where the influence of both continental and marine conditions occur.
BRAID_TRNV_BAR	Transverse Bar Environment	BRAID_SAND	A sand bar deposited in transverse orientation in a sandy braided stream.
TRANS_SHLW_UPPER_SHORE	Upper Shoreface Environment	TRANS_SHLW_SHORE	The upper part of the zone of marine coastline between mean low-tide level and normal wave base, shoreward of the zone of longshore bars.
VOLC	Volcanic Environment	SILC_CLST	Sedimentary depositional environment in the proximity of an active volcano.

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