<descriptor thcode="1"><thesaurus thcode="1" name="Common geographic areas" scope="Names and identifiers of commonly-known geographic areas including oceans, continents, countries, states and provinces in North America, counties in the United States, USGS map quadrangles, and hydrologic units, nested and cross-referenced by overlap." creator="U.S. Geological Survey" rights="Public domain" edition="1.0" date="2002-03-21" codetype="alpha" prefix="geo" uri="http://www.usgs.gov/science/CommonGeographicAreas" tblname="geo" nonpref="geonp" relterm="geort" root_code="root" contact="pschweitzer"><category><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="30" name="ambiguous labels" parent="26" scope="A given preferred label may be used for more than one concept in the thesaurus. A concept must be specified using its unique identifier (code). This may occur in the names of places or people."/><term thcode="25" code="4" name="place" parent="2" scope="Terms indicate extent in space, typically by reference as the names of geographic areas known from information that is stored elsewhere."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="30" name="ambiguous labels" parent="26" scope="A given preferred label may be used for more than one concept in the thesaurus. A concept must be specified using its unique identifier (code). This may occur in the names of places or people."/><term thcode="25" code="4" name="place" parent="2" scope="Terms indicate extent in space, typically by reference as the names of geographic areas known from information that is stored elsewhere."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/></category><altlabel><altlabel>Augmented FIPS 10-4 and FIPS 6-4</altlabel><altlabel>Augmented FIPS 10-4 and FIPS 6-4</altlabel><altlabel>CommonGeographicAreas</altlabel><altlabel>CommonGeographicAreas</altlabel></altlabel></thesaurus><term thcode="1" code="aroot" name="US Aquifers" parent="fUS" scope="Aquifers of the 48 conterminous United States, Hawaii, Puerto Ri"/><bt><term thcode="1" code="fUS" name="United States" parent="fLD10" scope="country"/><term thcode="1" code="fLD10" name="North America" parent="fLD" scope="continent"/><term thcode="1" code="fLD" name="Land" parent="root" scope="continent"/><term thcode="1" code="root" name="Earth" scope="Common geographic areas focused on the US"/></bt><nt><term thcode="1" code="art" name="(aquifer rock types)" parent="aroot" scope="Generalized rock types of aquifers"/><term thcode="1" code="a307" name="Ada-Vamoosa aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a407" name="Arbuckle-Simpson aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a101" name="Basin and Range basin-fill aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a401" name="Basin and Range carbonate-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a414" name="Biscayne aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a406" name="Blaine aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a103" name="California Coastal Basin aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a312" name="Cambrian-Ordovician aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a418" name="Castle Hayne aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a306" name="Central Oklahoma aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a106" name="Central Valley aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a201" name="Coastal lowlands aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a301" name="Colorado Plateaus aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a607" name="Columbia Plateau basaltic-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a116" name="Columbia Plateau basin-fill aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a302" name="Denver Basin aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a308" name="Early Mesozoic basin aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a501" name="Edwards-Trinity aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a413" name="Floridan aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a609" name="Hawaiian Sedimentary deposit aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a608" name="Hawaiian Volcanic-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a107" name="High Plains aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a313" name="Jacobsville aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a420" name="Kingshill aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a304" name="Lower Cretaceous aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a314" name="Lower Tertiary aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a311" name="Marshall aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a109" name="Mississippi River Valley alluvial aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a203" name="Mississippi embayment aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a503" name="Mississippian aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a416" name="New York and New England carbonate-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a309" name="New York sandstone aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a205" name="Northern Atlantic Coastal Plain aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a105" name="Northern Rocky Mountains Intermontane Basins aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a411" name="Ordovician aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a999" name="Other rocks" parent="aroot" scope="aquifer"/><term thcode="1" code="a405" name="Ozark Plateaus aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a610" name="Pacific Northwest basaltic-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a104" name="Pacific Northwest basin-fill aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a504" name="Paleozoic aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a108" name="Pecos River Basin alluvial aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a310" name="Pennsylvanian aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a417" name="Piedmont and Blue Ridge carbonate-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a611" name="Piedmont and Blue Ridge crystalline-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a419" name="Puerto Rico North Coast Limestone aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a114" name="Puerto Rico south coast aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a112" name="Puget Sound aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a102" name="Rio Grande aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a402" name="Roswell Basin aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a305" name="Rush Springs aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a110" name="Seymour aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a410" name="Silurian-Devonian aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a606" name="Snake River Plain basaltic-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a117" name="Snake River Plain basin-fill aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a204" name="Southeastern Coastal Plain aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a601" name="Southern Nevada volcanic-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a111" name="Surficial aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a202" name="Texas coastal uplands aquifer system" parent="aroot" scope="aquifer"/><term thcode="1" code="a315" name="Upper Cretaceous aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a316" name="Upper Tertiary aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a412" name="Upper carbonate aquifer" parent="aroot" scope="aquifer"/><term thcode="1" code="a502" name="Valley and Ridge aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a505" name="Valley and Ridge carbonate-rock aquifers" parent="aroot" scope="aquifer"/><term thcode="1" code="a115" name="Willamette Lowland basin-fill aquifers" parent="aroot" scope="aquifer"/></nt></descriptor>