Tooting Crater Ejecta

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Caption:

Map Projected Browse Image
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In this picture we can see a huge tongue-like form , which looks a like a mudflow with boulders on its surface. This "tongue" is only a small part of a larger deposit that completely surrounds Tooting Crater (not visible in this image). This is part of what is called an "ejecta blanket."

The shape and form of the deposits in the ejecta blanket can tell us about the condition of the ground when the impact crater was formed. The presence of this tongue of ejecta is interpreted as a sign that the ground was frozen before impact. The force of the impact melted ice and mixed it with rock and dust as it was thrown away from the crater. It then settled to form these tongue-like lobes all around the crater.

The map is projected here at a scale of 50 centimeters (19.7 inches) per pixel. (The original image scale is 57.3 centimeters [22.6 inches] per pixel [with 2 x 2 binning]; objects on the order of 172 centimeters [67.7 inches] across are resolved.) North is up.

Background Info:

The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

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