File:Grand Canyon Uncomformities and Missing Time.jpg

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Captions

Captions

Figure of major unconformities in the Grand Canyon strata and the missing geologic time that they represent

Summary

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Description
English: Figure showing the major unconformities that exist within the sequence of rock strata exposed in the Grand Canyon and the missing time that they represent.
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

Licensing

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Public domain
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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