<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-151" name="Scarp/Wall" parent="GC-011" scope="Geoform: A relatively straight, cliff-like face or slope of considerable linear extent, which breaks up the general continuity of the land by separating surfaces lying at different levels (as along the margin of a plateau or mesa). ..."/><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-154" name="Beach Scarp" parent="GC-151" scope="Geoform Type: An almost vertical slope (caused by wave erosion) that fronts a berm on a beach. Scarps may range in height from several centimeters to a few meters, depending on the character of the wave action and the nature and composition of the beach."/><term thcode="62" code="GC-153" name="Erosion Scarp" parent="GC-151" scope="Geoform Type: A long, steep slope or line of cliffs at the edge of a plateau or ridge formed by erosion."/><term thcode="62" code="GC-152" name="Fault Scarp" parent="GC-151" scope="Geoform Type: A feature caused by the rapid erosion of soft rock on the side of a fault (as compared to that of more resistant rock on the other side), for example, the east face of the Sierra Nevada in California."/></nt></descriptor>