Inverted Riverbed in Gale Crater, Mars
by conorokane, published
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Gale Crater is a large, approximately 152 kilometer-diameter impact crater that lies near the Martian equator. Contained within the crater is a massive central mound of layered material. With an average vertical thickness of almost 4 kilometers, the Gale Crater layered deposits are twice as thick as the layers exposed along the Grand Canyon on Earth.
Shown here is a portion of the mound with an inverted fluvial or river channel. Topographic inversion occurs when sediments are cemented together, forming a harder layer that is resistant to later erosion. This later erosion has preferentially removed material outside the channel, leaving the former riverbed exposed as a ridge—a topographic high. This inverted channel was originally detected by scientists using Mars Orbiter Camera (MOC) images onboard the Mars Global Surveyor spacecraft.
(Description from http://www.uahirise.org/PSP_009149_1750)
6 top layers.
After printing any holes in the model were filled. It was then painted with acrylics and inks to match the colors visible in the HiRISE color pictures of the region.
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Inverted Riverbed in Gale Crater, Mars by conorokane is licensed under the Creative Commons - Attribution license.
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