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Ripple marks in sandstone of the Proterozoic Grinnell Formation of the Belt Supergroup, Glacier National Park, Montana. (110623-32)
Small-scale cross-bedding in sandstone. (110528-57)
Sedimentary Breccia, made of limestone fragments and a matrix of calcite, exposed in a wall of Titus Canyon in Death Valley National Park, California. Interstitial material is calcite. Interstitial material is calcite. (110501-16)
Depositional contact and erosional windows, Jurassic Entrada Fm (red) overlying Jurassic Navajo Sandstone (white), Arches National Park, Utah. (090316-115)
Sedimentary breccia of Hoh Subduction assemblage, Olympic Coast, Washington. The white fragment is limestone mixed with sandstone fragments. (150912-46)
Cambrian limestone in Death Valley National Park, California (Image ID# 30-4134)
Thousands of feet of Paleozoic and Mesozoic sedimentary rock, exposed in the canyons of Southeastern Utah. (Image ID# WE-141)