File:2021 Revised USGS Geologic Stratigraphic Column of the Grand Canyon.jpg
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Summary
| Description |
English: 2021 revision of the stratigraphic column of strata of the Grand Canyon region showing individual geologic formations and major unconformities that comprise three sets of strata; 1. Vishnu Basement Rocks, 2. Grand Canyon Supergroup, and 3. Layered Paleozoic Rocks. The major unconformities are the 1. Great Nonconformity, 2. Great Angular Unconformity, and 3. Great Unconformity. |
| Date | |
| Source | Karlstrom, K., L. Crossey, A. Mathis, and C. Bowman. 2021. Telling time at Grand Canyon National Park: 2020 update. Natural Resource Report NPS/GRCA/NRR—2021/2246. National Park Service, Fort Collins, Colorado. https://doi.org/10.36967/nrr-2285173. |
| Author | U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado |
| 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. | ||
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:06, 4 June 2024 | | 1,300 × 867 (357 KB) | Paul H. | Uploaded a work by U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado from Karlstrom, K., L. Crossey, A. Mathis, and C. Bowman. 2021. Telling time at Grand Canyon National Park: 2020 update. Natural Resource Report NPS/GRCA/NRR—2021/2246. National Park Service, Fort Collins, Colorado. https://doi.org/10.36967/nrr-2285173. with UploadWizard |
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