File:Inverted crater mesa, Mars.jpg

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English: Eye of the Beholder

ESP_028957_2085 Science Theme: Sedimentary/Layering Processes

Nilosyrtis Mensae is an ancient terrain with a wonderful variety of landforms and rock types.

What is this circular landform? It probably got its shape from an impact crater long ago, but was subsequently eroded and filled in and eroded again, so that now it is a low mesa surrounded by a boulder-rich geologic unit.
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Source http://hirise.lpl.arizona.edu/ESP_028957_2085
Author NASA HiRISE camera, Mars Reconnaissance Orbiter.
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Public domain 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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