View of Delicate Arch, an entrada sandstone formation, in Arches National Park, Utah ID: 6666 6666 0413 0222 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	View of entrada sandstone formation fins in Arches National Park, Utah ID: 6666 6666 0413 0223 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Fossil dune patterns in Navajo sandstone formations, Arches National Park, Utah ID: 6666 6666 0413 0224 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Volcanic bombs from Big Bomb Crater, Diamond Craters National Monument ID: 6666 6666 0413 0220 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences
Bread crust volcanic bomb from Big Bomb Crater, Diamond Craters National Monument ID: 6666 6666 0413 0221 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Petrified logs of Morrison formation in Escalante State Park, Utah ID: 6666 6666 0413 0225 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Petrified logs of Morrison formation in Escalante State Park, Utah ID: 6666 6666 0413 0226 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Cave popcorn at Great Basin National Park, Nevada ID: 6666 6666 0413 0215 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences
Lehman Caves at Great Basin National Park, Nevada ID: 6666 6666 0413 0216 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Lehman Caves at Great Basin National Park, Nevada ID: 6666 6666 0413 0217 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Desert varnish and Navajo sandstone in Heaps Canyon, Zion National Park, Utah ID: 6666 6666 0413 0228 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Desert varnish and Navajo sandstone in Heaps Canyon, Zion National Park, Utah ID: 6666 6666 0413 0229 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences
Desert varnish and Navajo sandstone in Heaps Canyon, Zion National Park, Utah ID: 6666 6666 0413 0230 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Desert varnish and Navajo sandstone in Heaps Canyon, Zion National Park, Utah ID: 6666 6666 0413 0231 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Stalactites, Mercer Caverns ID: 6666 6666 0413 0161 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Tafoni at Salt Point State Park, Sonoma County, California ID: 6666 6666 0513 0131 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences
Tafoni Formation in Sedimentary Rock at Salt Point State Park, Sonoma County, California ID: 6666 6666 0513 0132 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Tafoni at Salt Point State Park, Sonoma County, California ID: 6666 6666 0513 0133 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences	Desert varnish in Zion National Park, Utah ID: 6666 6666 0413 0227 [detail] Gerald and Buff Corsi © 2013 California Academy of Sciences

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