Images

Research Geologist Theresa Schwartz walks over Cenozoic sedimentary rocks in Death Valley National Park (California, USA).

Research Geologist Marieke Dechesne investigates heavy mineral-bearing shoreface deposits in the Upper Cretaceous Trinidad Sandstone (Raton Basin, New Mexico, USA).

Joshua trees (Yucca brevifolia) grow on middle Cenozoic sedimentary rocks of the Las Vegas region (southern Nevada, USA).  

Intermountain West Project members Adam Hudson and Michael Frothingham inspect young aeolian deposits of the San Juan River corridor (Bluff, Utah, USA). 

Red sedimentary rocks of the Pennsylvanian-Permian Maroon Formation exposed on Avery Peak dip southwestward away from gray igneous rocks of the Cenozoic White Rock pluton.

Intermountain West Project members Theresa Schwartz and Alexander Lusk investigate the Pennsylvanian Honaker Trail Formation at Goosenecks State Park (Utah, USA). 

Geologist Alexander Lusk investigates slickenlines on the Moab fault near Arches National Park (Utah, USA).

Wild burros stand guard on the path to Miocene volcaniclastic rocks of the Death Valley region (California, USA).

Geologic Framework of the Intermountain West project members Adam Hudson, Margaret Berry, Harrison Gray, Cal Ruleman, and Samuel Johnstone perform field work for a topographic asymmetry study in the Great Sand Dunes National Park and Preserve (Sangre de Cristo Mountains, Colorado, USA).

Strongly deformed Paleoproterozoic granitic intrusions in biotite schist (Spaghetti Canyon, Lower Granite Gorge, Grand Canyon, Arizona, USA). 

The Colorado River, brown from heightened suspended load following rains, flows through Paleoproteroic basement and overlying Cambrian Tapeats Sandstone in the Grand Canyon (Arizona, USA).

A view westward from Cottonwood Pass (Sawatch Range, Colorado, USA) into the Taylor Park basin. The peaks in the backgorund are composed of igneous and metamorphic rocks ranging in age from early Paleozoic to Eocene, uplifted along the Taylor Park fault.

Research Geologist Jens-Erik Lundstern explores multi-colored lacustrine shales of the Oligocene Amargosa Valley Formation (Bat Mountain, California, USA). 

Research Geologist Jens-Erik Lundstern poses as a scale for middle Cenozoic fluvial conglomerates in the Delamar Mountains (southern Nevada, USA). 

Intermountain West Project members pose at the summit of Crested Butte (Colorado, USA) prior to examining the Crested Butte laccolith (from left to right, Jeremy Workman, Allison Dombrowski, Ian Hillenbrand, Amy Gilmer, Kenzie Turner, and Ren Thompson). 

Sunset view across Little Molas Lake, an alpine glacial lake on the west side of the Animas River Valley (San Juan Mountains, Colorado, USA).

The flat-lying rhyolite of Cropsy Mountain overlies the hydrothermally altered Summitville Andesite (San Juan Mountains, Colorado, USA). 

Research Geologist Theresa Schwartz takes field notes about the Cenozoic sedimentary rocks of Bat Mountain (Death Valley region, California, USA).

Research Geologist Amy Gilmer walks over carbonate rocks of the Upper Triassic Star Peak Group (northern Humboldt Range, Nevada, USA).

Research Geologist A. Kate Souders samples fluvial sandstones of the Upper Triassic Chinle Formation (eastern Nevada, USA). 

Research Geologist A. Kate Souders investigates complexly deformed, middle Cenozoic volcaniclastic rocks of the Death Valley region (California, USA).