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Basalt Composition from Rock Characteristics - All samples called basalt in the database
Basin and Range Province - Basin and Range of western North America
Black Hills - Tertiary magmatism in the Black Hills of SD/WY
Columbia River Basalts - CRB in WA, OR, and ID; NOTE: as of 12/2006, the largest sample contribution is from the IDGS for a relatively small area in western ID
Coso Volcanic Field - Active Miocene to recent field in eastern California
Cove Fort Shield Volcano - Basaltic shield volcano east of the Mineral Mountains.
Crater Flat-Lathrop Wells - young basalts near Yucca Mnt
Damavand - Damavand Volcano, Alborz Mountains, N. Iran
Eastern Mojave Desert middle Miocene volcanics - Outline of eastern Mojave Desert area
Fish Lake Valley, Nevada - Basin in western Nevada with surrounding ranges
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Idaho batholith - main phases of Bitterroot and Atlanta lobes along with older border phases and younger Challis-related epizonal plutons
Indian Wells Valley - Valley adjacent to Sierra Nevada
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Lake Mead area - Extensional region in southern Nevada
Malpais Mesa - Basalt field in eastern California
Mineral Mountains, Utah - Mineral Mountain igneous complex
Mogollon-Datil Volcanic Field - A major mid-Tertiary volcanic field in southwestern New Mexico
Mojave Desert - Crustal block in southern California
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Panamint Valley - Panamint Valley, California. Late Tertiary extensional basin
Pinto Peak - Fault block with tilted volcanic section, Panamint Range, California
Pisgah - Cinder cone in central Mojave Desert
Popocateptl - Volcano in Mexico
Portrillo Volcanic Field - Volcanic field in southern New Mexico of 0 to 5 Ma
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San Juan Volcanic Field - A major Mid-Tertiary volcanic field in southwestern Colorado
Slate Range - Slate Range of Eastern California
Snake River Plain - Yellowstone hotspot track in Idaho and Yellowstone system itself. Includes both the rhyolite caldera complexes and the younger basalts.
testing - testing
Trans-Pecos Volcanic Field - A major mid-Tertiary volcanic field in southwestern Texas
Tucson, Arizona - Area around Tucson, Arizona
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White Mountains - Range in eastern California - western Nevada
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