Strike Valley Overlook in Capitol Reef National Park

From the U.S. Geological Survey (USGS):

For the Geology Geeks — Oh, we love ya, and we know there's more of you out there than would like to admit. But, if you're still not sure if you want to open up about your geologic geekdom, then just read this REALLY LONG caption and bathe in the geologic awesomeness that is the Strike Valley Overlook in Capitol Reef National Park.

Perhaps the most amazing view in Capitol Reef National Park is this scene looking south from the Strike Valley Overlook along a great, warping arc of strata exposed in the Waterpocket Fold. The scene encompasses about a 2 kilometer thick section of sedimentary rocks representing about 130 million years of earth history in the region. The oldest sedimentary rocks on the right (the Navajo Sandstone) represent a great blanket of desert dunes that extended across the region in Early Jurassic time. Beneath the valley of Halls Creek is a sequence of Jurassic-age sedimentary units that includes the Carmel (red, above the Navajo), Entrada, Curtis and Summerville Formations. The Morrison Formation (Late Jurassic) and Dakota Sandstone (Late Cretaceous) are exposed along the ridge in the center of the valley. These formations reflect the changes in Jurassic time when the great dune fields gave way to coastal tidal flats, floodplains, swamps, and shallow, marginal marine environments associated with inland seas. The Mancos Shale (gray layer on slope on left) represents the formation of a great inland Western Interior Seaway that existed in the region through much of Late Cretaceous time. The sandstone rimrock of Tarantula Mesa on the left is Mesaverde Formation. The Mesaverde Formation consists of materials deposited in nearshore and coastal environmental settings as the Western Interior Seaway gradually withdrew from the region near the end of the Late Cretaceous period. The great upwarp of the Waterpocket Monocline is a prominent Laramide structural fold that formed in Early Tertiary time.

Thanks to Ida & Leo (ida_leo on Flickr) for sharing this photo with the USGS Science in Action Flickr Group! Share your earth science photo for a chance to be featured in upcoming USGS products and social media: https://www.flickr.com/groups/usgsscience.

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