<Tr> <Td> Black Rock Desert volcanic field </Td> <Td> 1,800 </Td> <Td> 5,904 </Td> <Td> 38 ° 58 ′ 12" N 112 ° 30 ′ 00" W ﻿ / ﻿ 38.970 ° N 112.500 ° W ﻿ / 38.970; - 112.500 ﻿ (Black Rock Desert volcanic field) </Td> <Td> 600--900 years ago </Td> </Tr> <Tr> <Td> Santa Clara </Td> <Td> 1,465 </Td> <Td> 4,806 </Td> <Td> 37 ° 15 ′ 25" N 113 ° 37 ′ 30" W ﻿ / ﻿ 37.257 ° N 113.625 ° W ﻿ / 37.257; - 113.625 ﻿ (Santa Clara) </Td> <Td> - </Td> </Tr> <Table> <Tr> <Td> Name </Td> <Td_colspan="2"> Elevation </Td> <Td> Location </Td> <Td> Last eruption </Td> </Tr> <Tr> <Td> meters </Td> <Td> feet </Td> <Td> Coordinates </Td> </Tr> <Tr> <Td> Mole Hill </Td> <Td> - </Td> <Td> - </Td> <Td> 38 ° 26 ′ 55" N 78 ° 57 ′ 12" W ﻿ / ﻿ 38.44861 ° N 78.95333 ° W ﻿ / 38.44861; - 78.95333 ﻿ (Mole Hill) </Td> <Td> 47 million years ago </Td> </Tr> <Tr> <Td> Trimble Knob </Td> <Td> - </Td> <Td> - </Td> <Td> 38 ° 24 ′ 17" N 79 ° 35 ′ 16" W ﻿ / ﻿ 38.40472 ° N 79.58778 ° W ﻿ / 38.40472; - 79.58778 ﻿ (Trimble Knob) </Td> <Td> 35 million years ago </Td> </Tr> </Table> <Tr> <Td> Name </Td> <Td_colspan="2"> Elevation </Td> <Td> Location </Td> <Td> Last eruption </Td> </Tr>

How many volcanoes are in the united states