21 Aug, 2019
By, Wikipedia
File:2021 Revised USGS Geologic Stratigraphic Column Of The Grand Canyon.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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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 |