File:Vertebrate tracks on sand (Bruneau Sand Dunes, Snake River Plain, Idaho, USA) 2.jpg
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| Description |
English: The Eagle Cove Depression of southern Idaho's Snake River Plain has a concentration of fairly large sand dunes, including the largest single-structured dune in all of North America. The sand is dominantly quartzose (~62%) with minor feldspar (~26%) & ferromagnesian minerals (~12%). The sediments are derived from erosion of Bruneau Formation & Glenns Ferry Formation rocks (Idaho Group, Plio-Pleistocene).
The sand dunes at Eagle Cove are fairly young - they were deposited by winds during the last 11,000 years. As such, they post-date the draining of ancient Lake Bonneville, which is the Pleistocene precursor to Utah's Great Salt Lake. The larger sand dunes here are partly stabilized by vegetation along the bases. The tallest sand dunes reach >400 feet above the level of a nearby lake. Two dunes alone here cover ~600 acres worth of land. Site-specific info. synthesized from: Murphy (1973) - The Geology of Eagle Cove at Bruneau, Idaho. M.S. thesis. State University of New York at Buffalo. 77 pp. & from info. provided by Bruneau Dunes State Park. |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49412902896/ |
| 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@N05/49412902896 (archive). It was reviewed on 21 January 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 06:02, 21 January 2020 | | 1,280 × 960 (750 KB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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