Mar 31, 2025
Muddy Montains from Callville Wash, Lake Mead National Recreation Area
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Muddy Montains from Callville Wash, Lake Mead National Recreation Area
Sunrise Journey by James Marvin Phelps Via Flickr: Sunrise Journey Lake Mead National Recreation Area Nevada November 2021
The Muddy Mountain Overthrust on the outskirts of Valley Of Fire State Park In Nevada.
The overthrust is comprised of the dark overturned almost vertical Bonanza King Formation (500 million years old, Paleozoic) capped by the Rainbow Gardens Member of the Horse Spring Formation (not visible in this photo) which was placed in the Neogene age 20 million years ago.
Under the thrust sheet is the Moenkopi, Chinle, Moenave and Kayenta Formations (all within the Triassic and Jurassic) which have slowly eroded away while the younger more resistant Jurassic Aztec Sandstone Formation is preserved on both sides of the anticline.
Sunset Cloudscape by James Marvin Phelps Via Flickr: Sunset Cloudscape Echo Bay Lake Mead National Recreation Area Nevada November 2021
Echo Mountains Sunrise by James Marvin Phelps Via Flickr: Echo Mountains Sunrise Lake Mead National Recreation Area Nevada November 2021