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Summary
| Description |
English: Morrison Formation type locality above the town of Morrison Colorado as designated by Whitman Cross in 1894. The resistant ridge is the Dakota Hogback, composed of the Lytle and Plainview formations. The Morrison Formation is exposed on the slope below the ridge. The white patch above the road is Arthur Lakes Quarry 10 that produced the holotypes of Apatosaurus ajax (YPM 1860), Apatosaurus laticollis (YPM 1861), and Atlantosaurus immanis (YPM l840). The designation of a "new" type by Walschmidt and LeRoy in 1944 several miles farther north was a violation of the North American Stratigraphic Code; it qualifies as a reference section. |
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| Source | https://library.usgs.gov/photo/index.html#/item/51dc2a32e4b0f81004b79658 |
| Author | U.S. Geological Survey (Data Owner), Campbell, Marius Robinson (Photographer) |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:10, 17 March 2021 | | 5,657 × 1,765 (5.36 MB) | Carpenter, Kenneth | Uploaded a work by U.S. Geological Survey (Data Owner), Campbell, Marius Robinson (Photographer) from https://library.usgs.gov/photo/index.html#/item/51dc2a32e4b0f81004b79658 with UploadWizard |
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