File:Theropod dinosaur footprint in sandstone (Kayenta Formation or Navajo Sandstone, Lower Jurassic; Potash-Poison Spider dinosaur tracksite, Williams Bottom, west of Moab, Utah, USA) 30 (32809019950).jpg

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Dinosaur footprint in sandstone in the Jurassic of Utah, USA.

This is the top of a sandstone bed with a decent-sized, three-toed dinosaur footprint. Trace fossils that are indented at the top of a bed are known as concave epirelief. The dinosaur that produced the track was a theropod, which were medium-sized to very large, bipedal, carnivorous (predatory) dinosaurs.

Stratigraphy: talus block derived from the Kayenta Formation or the Navajo Sandstone, Lower Jurassic

Locality: talus block on slope of Kayenta Formation, Potash Road/Poison Spider Dinosaur Tracksite, just north of the Poison Spider Trailhead parking lot, adjacent to Williams Bottom along the Colorado River, next to Potash Road (Rt. 279), southwest of the town of Moab, southern Grand County, eastern Utah, USA (vicinity of 38° 32' 01.09" North latitude, 109° 36' 29.92" West longitude)
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Source Theropod dinosaur footprint in sandstone (Kayenta Formation or Navajo Sandstone, Lower Jurassic; Potash-Poison Spider dinosaur tracksite, Williams Bottom, west of Moab, Utah, USA) 30
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/32809019950. It was reviewed on 2 December 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

2 December 2018

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current07:39, 2 December 2018Thumbnail for version as of 07:39, 2 December 20184,000 × 2,544 (7.03 MB)Rudolphous (talk | contribs)Transferred from Flickr via #flickr2commons

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