File:Meanderingridgeswide ESP 079382 1735 01.jpg

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Summary

Description	English: These ridges were once streams that became inverted over time. NASA has this to say about the image: Multiple processes, which may have occurred billions of years apart, are reflected in this HiRISE image of Aeolis Planum. Cutting across the scene are curvilinear ridges. These likely represent ancient, meandering river channels that flowed across the surface and buried themselves over time. The channels have subsequently been exposed to the surface by the wind, forming the cross-cutting ridges. Approximately north-south across the image are a series of linear ridges called “yardangs,” which are streamlined landforms that also form due to wind-driven erosion. The orientation of the yardangs reflects the prevailing wind direction when they formed. Both sets of ridges emerged from the preferential removal of softer bedrock by the wind. Written by: Joel Davis (13 December 2023)
Date	Multiple processes, which may have occurred billions of years apart, are reflected in this HiRISE image of Aeolis Planum. Cutting across the scene are curvilinear ridges. These likely represent ancient, meandering river channels that flowed across the surface and buried themselves over time. The channels have subsequently been exposed to the surface by the wind, forming the cross-cutting ridges. Approximately north-south across the image are a series of linear ridges called “yardangs,” which are streamlined landforms that also form due to wind-driven erosion. The orientation of the yardangs reflects the prevailing wind direction when they formed. Both sets of ridges emerged from the preferential removal of softer bedrock by the wind. Written by: Joel Davis (13 December 2023)
Source	https://www.uahirise.org/ESP_079382_1735
Author	Jim Secosky selected pictures from NASA files. This image was named HiRISE picture of the day for December 13, 2023. The credit should read NASA/JPL-Caltech/UArizona.

Location on Mars	6° 15′ 39.6″ S, 151° 15′ 25.2″ E	View this and other nearby images on: Google Maps	-6.261000; 151.257000

Licensing

	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.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:48, 13 December 2023		2,048 × 6,230 (3.2 MB)	Jimmarsmars	Uploaded a work by Jim Secosky selected pictures from NASA files. This image was named HiRISE picture of the day for December 13, 2023. The credit should read NASA/JPL-Caltech/UArizona. from https://www.uahirise.org/ESP_079382_1735 with UploadWizard