<descriptor thcode="62"><thesaurus thcode="62" name="Coastal and Marine Ecological Classification Standard" scope="Categories of ecosystems for coastal, estuarine, and marine environments." creator="FGDC" rights="public domain" date="2017-05-10" codetype="alpha" prefix="cmecs" uri="https://www2.usgs.gov/science/CMECS" tblname="cmecs" root_code="root" contact="pschweitzer"><category><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/></category><altlabel><altlabel>CMECS</altlabel><altlabel>CMECS</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel></altlabel></thesaurus><term thcode="62" code="GC-074" name="Delta" parent="GC-011" scope="Geoform: The low, nearly flat, alluvial tract of land at (or near) the mouth of a river. ..."/><bt><term thcode="62" code="GC-011" name="Geologic" parent="GC-C052" scope="Geoform Origin: Geologic geoforms are formed by the abiotic processes of uplift, erosion, volcanism, deposition, fluid seepage, and material movement. ..."/><term thcode="62" code="GC-C052" name="Geoform (levels 1 and 2 subcomponents)" parent="GC-C005"/><term thcode="62" code="GC-C005" name="Geoform" parent="root"/><term thcode="62" code="root" name="CMECS" scope="Coastal and Marine Ecological Classification Standard: Category terms encompassing waters from the head of tide or inland incursion of ocean salinity to the splash zone of the coasts to the deepest portions of the oceans and the deep waters of the Great Lakes."/></bt><nt><term thcode="62" code="GC-076" name="Ebb Tidal Delta" parent="GC-074" scope="Geoform Type: A largely subaqueous (although sometimes intertidal), crudely fan-shaped delta with sand-sized sediment, which has been formed on the seaward side of a tidal inlet (modified from Boothroyd et al. 1985; Davis 1994; Ritter, Kochel, and Miller 1995)."/><term thcode="62" code="GC-077" name="Flood Tidal Delta" parent="GC-074" scope="Geoform Type: Equivalent to an Ebb Tidal Delta, except that this delta occurs on the landward side of a tidal inlet (modified from Boothroyd et al. ..."/><term thcode="62" code="GC-078" name="Flood Tidal Delta Slope" parent="GC-074" scope="Geoform Type: The sloping surfaces found at the edge of the tidal delta."/><term thcode="62" code="GC-075" name="Glacial (Kame) Delta" parent="GC-074" scope="Geoform Type: A landform made by a stream flowing through glacial ice and then depositing material as it enters a lake or pond at the end (or terminus) of the glacier. ..."/><term thcode="62" code="GC-079" name="Levee Delta" parent="GC-074" scope="Geoform Type: A delta having the form of a long, narrow ridge that resembles a natural levee."/></nt></descriptor>