<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-196" name="Deep/Cold-Water Coral Reef" parent="GC-184" scope="Geoform: Reefs formed by deepwater azooxanthellate (i.e., lacking symbiotic algae), stony corals (Order Scleractinia). ..."/><bt><term thcode="62" code="GC-184" name="Biogenic" parent="GC-C052" scope="Geoform Origin: Biogenic geoforms are physical features and landforms that were created by the action of living organisms (bioherms). ..."/><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-197" name="Biogenic Deep Coral Reef" parent="GC-196" scope="Geoform Type: Persistent structures, formed by deepwater corals, whose growth exceeds (bio) erosion. ..."/><term thcode="62" code="GC-198" name="Deep Coral Carbonate Mound" parent="GC-196" scope="Geoform Type: Topographic seafloor structures that are the result of previous periods of coral growth, often with successive periods of reef development, sedimentation, and erosion. ..."/></nt></descriptor>