NASA Mars Odyssey THEMIS Image: Ridges From Fractures
 Image Context:  Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team [ Find on map: Javascript version ] [ Find on map: CGI version ]
Full data on this image has now been released via the THEMIS Data Releases website. The upper portion of this VIS image illustrates the a situation where fractures have become ridges. The original fractures would have formed a polygonal pattern in the surface. Later infilling of the fractures by a material more resistant than the surrounding surface occurred, followed by erosion of the less resistant surface material. The result are the polygonal ridges seen in this image. This image was taken in the highlands northwest of Syrtis Major. [Source: ASU THEMIS Science Team] Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.
Image Credit: NASA/JPL/Arizona State University | ||||||||||||||||||||
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