Middle Proterozoic sedimentary rocks

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Geology above the Theodore Roosevelt Dam Arizona Middle Proterozoic sedimentary rocks Red brown shale and sandstone buff to orange quartzite limestone basalt black shale and sparse conglomerate Grand Canyon Supergourp Apache Group and Troy Quartzite Shallow marine coastal nonmarine fluvial settings Around 1 billion yrs old

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Size: 3413px × 5120px
Location: Apache Trail, Arizona
Photo credit: © Susan E. Degginger / Alamy / Afripics
License: Licensed
Model Released: No

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