<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-177" name="Terrace" parent="GC-011" scope="Geoform: Any long, narrow, relatively level or gently inclined surface, generally less broad than a plain, but broader than a ledge and bounded along one edge by a steeper descending slope and along the other by a steeper ascending slope. ..."/><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-178" name="Fluviomarine Terrace" parent="GC-177" scope="Geoform Type: A constructional, coastal strip, which slopes gently seaward and/or down valley and is veneered by (or completely composed of) unconsolidated fluviomarine deposits?typically silt, sand, and fine gravel (Schoeneberger and Wysocki 2005)."/><term thcode="62" code="GC-180" name="Marine Terrace" parent="GC-177" scope="Geoform Type: (a) A narrow, coastal strip, formed of deposited material, that slopes gently seaward. ..."/><term thcode="62" code="GC-179" name="Wave-Built Terrace" parent="GC-177" scope="Geoform Type: A subaqueous, relict, depositional landform originally constructed by river or longshore, sediment deposits along the outer edge of a wave-cut platform, and then later submerged by rising sea level or subsiding land surface (modified from Jackson 1997)."/></nt></descriptor>