File:Kayenta Formation (Lower Jurassic; Red Canyon, Colorado National Monument, Colorado, USA) 2 (23909626541).jpg
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Summary[edit]
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| Description |
Quartzose sandstones in the Jurassic of Colorado, USA. Colorado National Monument is a colorful and scenic park just southwest of the town of Grand Junction in western Colorado, USA. It's located in the northeastern part of the Colorado Plateau Physiographic Province, a large section of continental crust that was significant uplifted during the Cenozoic. The rocks in the park are gently folded into a large monocline that has been erosionally dissected into a series of dramatic canyons. The light-colored rocks shown above are relatively thin-bedded and lenticular-bedded quartzose sandstones with cross-bedding. This is the Kayenta Formation (Lower Jurassic). The Kayenta caps the cliff-forming Wingate Sandstone in the park. The underlying Wingate is a thick sand dune deposit, but the sandstones of the Kayenta were deposited in ancient streams and rivers. The Kayenta consists of fluvial sandstones plus mudshales and some conglomerate. The sandstone and conglomerate facies are channel deposits and the mudshales are floodplain deposits. The reddish-brown areas shown above are weathered Kayenta mudshales. Locality: Red Canyon, Colorado National Monument, southwest of the town of Grand Junction, west-central Mesa County, far-western Colorado, USA |
| Date | |
| Source | Kayenta Formation (Lower Jurassic; Red Canyon, Colorado National Monument, Colorado, USA) 2 |
| 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@N05/23909626541 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:59, 6 December 2019 | | 3,008 × 2,000 (3.12 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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