File:ESP 082970 1465gullyaprons 04.jpg
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Summary
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English: Gullies are visible on many steep slopes. Today they may be forming with the action of dry ice. In the past, water may have been involved. Image is about 1 km across. This image was named HiRISE Picture of the Day for June 6, 2024. NASA also wrote a caption fo it: These multi-elevation gullies have formed on the northern slope of a multi-lobed ejecta impact crater in Hesperia Planum in the ancient highlands of Mars. The higher elevation gullies have formed at or just below the crater rim with wide alcoves and some tributaries have eroded into underlying bedrock.
Aprons at the end of the gullies are cut by fractures. Some fractures have cut across certain fans while other fans have buried these fractures. The latter fans are likely younger than the fractured aprons. Gullies formed on the lower slopes to the west have largely cut into resistant bedrock layers. The fans of some of these gullies have also been cut by transverse fractures. The presence of these fractures and the curvy ridges downslope of the fans may be related to subsurface ice or perhaps glacial processes. The fractures are reminiscent of crevasses, which are formed by compressive forces, and the curvy ridges at the fan termini may suggest moraine-like features which mark the extent of a glacier with debris that the glacier was transporting. Written by: Ginny Gulick (25 June 2024) |
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| Source | https://www.uahirise.org/ESP_082970_1465 |
| Author | Jim Secosky suggested NASA image this spot with HiRISE through the HiWish program. The image credit should read: NASA/JPL-Caltech/UArizona |
| 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 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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:29, 25 June 2024 | | 1,828 × 816 (446 KB) | Jimmarsmars | Uploaded a work by Jim Secosky suggested NASA image this spot with HiRISE through the HiWish program. The image credit should read: NASA/JPL-Caltech/UArizona from https://www.uahirise.org/ESP_082970_1465 with UploadWizard |
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