File:Polygon shapes in Arabia, Mars.jpg

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English

Polygon shapes made by cracks being filled with dark sand

DescriptionPolygon shapes in Arabia, Mars.jpg	English: The picture shows polygon shapes that were made when the rocks cracked and then the cracks were filled of dark, basalt sand. Dark basalt sand is very common on Mars. Cracks may form when volcanic rock cools and contracts. Picture was displayed with the RGB color scheme with the HiView program.
Date	12 October 2023
Source	https://www.uahirise.org/ESP_074350_1825
Author	Jim Secosky selected and modified picture from NASA that was taken through the HiWish program Image credit is NASA/JPL-Caltech/UArizona/Secosky

	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	22:31, 9 November 2023		1,827 × 815 (331 KB)	Jimmarsmars (talk \| contribs)	Uploaded a work by Jim Secosky selected and modified picture from NASA that was taken through the HiWish program Image credit is NASA/JPL-Caltech/UArizona/Secosky from https://www.uahirise.org/ESP_074350_1825 with UploadWizard

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