Alan Cressler:
Behind the Rocks, Lower Jurassic Age, Navajo Sandstone, BLM Lands, Grand County, Utah 1
Alan Cressler:
Big Spring Canyon, from Big Spring Canyon Overlook, Canyonlands National Park, San Juan County, Utah 2
Alan Cressler:
Boquillas Canyon, Sand Dune, Big Bend National Park, Brewster County, Texas, Jeff Moore 2
Alan Cressler:
Boquillas Canyon, Sand Dune, Big Bend National Park, Brewster County, Texas, Manuel Beers 1
Alan Cressler:
Buckhorn Wash, San Rafael Swell, BLM Lands, Emery County, Utah 1
Alan Cressler:
Cactus Flats, San Rafael Swell, BLM Lands, Emery County, Utah 2
Alan Cressler:
Capitol Reef (Waterpocket Fold), Capitol Reef National Park, Wayne County, Utah 1
Alan Cressler:
Capitol Reef (Waterpocket Fold), Capitol Reef National Park, Wayne County, Utah 2
Alan Cressler:
Carnegiea gigantea (Crested), Sonoran Desert, Ironwood Forest National Monument, Pima County, Arizona 1
Alan Cressler:
Carnegiea gigantea (crested), Paige Creek Canyon, Cochise County, Arizona 1
Alan Cressler:
Carnegiea gigantea, Saguaro National Park (east), Pima County, Arizona 1
Alan Cressler:
Carnegiea gigantea, Saguaro National Park (east), Pima County, Arizona 1
Alan Cressler:
Cedar Mesa area, San Juan County, Utah 1
Alan Cressler:
Cedar Mesa area, San Juan County, Utah 2
Alan Cressler:
Chihuahuan Desert, Seminole Canyon State Park, Val Verde County, Texas 1
Alan Cressler:
Cly Butte, Monument Valley Navajo Tribal Park, Navajo Reservaton, Navajo County, Arizona 1
Alan Cressler:
Colorado River, Dry Mesa, from Rocky Rapids Access, Colorado Riverway, BLM Lands, Grand County, Utah 1
Alan Cressler:
Comb Ridge, and Butler Wash, distant Abajo Mountains, BLM Lands, San Juan County, Utah 1
Alan Cressler:
Comb Ridge, and Comb Wash, distant Abajo Mountains, BLM Lands, San Juan County, Utah 1
Alan Cressler:
Comb Wash, from Comb Ridge, BLM Lands, San Juan County, Utah 1
Alan Cressler:
Cylindropuntia bigelovii, Sonoran Desert, Tucson Mountain Park, Pima County, Arizona 1
Alan Cressler:
Eagle Canyon, San Rafael Swell, BLM Lands, Emery County, Utah 1
Alan Cressler:
Eagle Canyon, San Rafael Swell, BLM Lands, Emery County, Utah 2
Alan Cressler:
Ernst Tinaja Canyon, Cuesta Carlota, Big Bend National Park, Brewster County, Texas, Jeff Moore and Brian Killingbeck 1
Alan Cressler:
Ernst Tinaja, Boquillas Formation, and Buda Limestone, Late Cretaceous age, Cuesta Carlota, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Ernst Tinaja, Cuesta Carlota, Big Bend National Park, Brewster County, Texas 14
Alan Cressler:
Ernst Tinaja, Boquillas Formation, Late Cretaceous age, Cuesta Carlota, Big Bend National Park, Brewster County, Texas 7
Alan Cressler:
Ernst Tinaja, Boquillas Formation, and Buda Limestone, Late Cretaceous age, Cuesta Carlota, Big Bend National Park, Brewster County, Texas 9
Alan Cressler:
Ferocactus acanthodes, Borrego Palm Canyon, Anza-Borrego Desert State Park, San Diego County, California 1
Alan Cressler:
Granodiorite of Cocoraque Butte, Pima County, Arizona 1
