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4.50" x 8.00"
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6.50" x 10.00"
A Gullied Crater Wall In The Terra Poster
by Stocktrek Images
Product Details
A Gullied Crater Wall In The Terra poster by Stocktrek Images. Our posters are produced on acid-free papers using archival inks to guarantee that they last a lifetime without fading or loss of color. All posters include a 1" white border around the image to allow for future framing and matting, if desired.
Design Details
July 25, 2005 - This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a gullied crater wall in the Terra Sirenum region of Mars. The... more
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Artist's Description
July 25, 2005 - This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a gullied crater wall in the Terra Sirenum region of Mars. The fluids that formed the gully channels and deposited debris in aprons at the base of the crater wall may have percolated through layers in the layered bedrock exposed in the crater wall. As fluid seeped out of the ground, it undermined overlying layers of rock, and caused the formation of several compex alcoves, higher in the crater wall. The formation of alcoves requires the undermining and collapse of layered material at a point where the channel begins; this is a key observation supporting the hypothesis that martian gullies require groundwater, not snowmelt or other exotic processes or fluids, to form.
$20.56
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