File:Channel edge in sandstone (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 7.jpg
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Summary
| Description |
English: Tidal bundles of sandstone-mudrock in the Cretaceous of Colorado, USA.
This outcrop is part of Dinosaur Ridge (a section of the Dakota Hogback), which is a north-south trending ridge of eastward-dipping Mesozoic sedimentary rocks. Triassic, Jurassic, and Cretaceous rocks are present, tilted by Laramide Orogeny uplift during the Cenozoic (the Front Range of the Colorado Rocky Mountains is immediately west of here). The exposure consists of structurally tilted beds of the Dakota Sandstone, a Lower Cretaceous succession of nearshore terrestrial to intertidal to shallow marine quartz sandstone deposits. In the center of the picture is a somewhat wedge-shaped layer, interpreted as the edge of an ancient channel. Stratigraphy: upper Dakota Sandstone, Albian Stage, upper Lower Cretaceous Locality: eastern side of Dinosaur Ridge, between Interstate 70 and the town of Morrison, west of Denver, north-central Colorado, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52643425904/ |
| 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@N05/52643425904. It was reviewed on 23 January 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:14, 23 January 2023 | | 3,008 × 2,000 (5.64 MB) | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52643425904/ with UploadWizard |
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