File:Layers and layered mounds ESP 26270 1820.jpg
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Summary
| Description |
English: Extensive erosion in this region has exposed numerous rock layers. Layers are visible on the flanks of some hills and on the basement (the lowest rock unit) between the hills.
Layers exposed on the sides of hills are visible as terraced steps. The formation of these steps is a result in differences between layers in cohesion and resistance to weathering. Weaker layers disaggregate quickly into shallow slopes, while stronger layers maintain steep “sharp” appearing edges. Such contrast can occur, for example, between alternating strong lava flows and weak volcanic ash deposits. Between the hills dark sands blow across the landscape and have accumulated in hollows created by these differences in rock strength. Since the hollows tend to follow weaker layers, they outline the layer exposure, even when the topography of the hollows are too subtle to see on its own. This image was name HiRISE picture of the day for September 25, 2021 Written by: Mike Mellon (21 November 2012) This is a stereo pair with ESP_026270_1820. |
| Date | 21 November 2012 |
| Source | https://www.uahirise.org/ESP_027747_1820 |
| Author | Jim Secosky selected pictures from NASA files and then modified them. The credit should read NASA/JPL-Caltech/UArizona/Secosky |
| 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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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:26, 1 January 2024 | | 1,829 × 817 (523 KB) | Jimmarsmars | Uploaded a work by Jim Secosky selected pictures from NASA files and then modified them. The credit should read NASA/JPL-Caltech/UArizona/Secosky from https://www.uahirise.org/ESP_027747_1820 with UploadWizard |
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