Ramparts in Tooting Crater
NASA/JPL-Caltech/UArizona
Ramparts in Tooting Crater
ESP_013089_2040  Science Theme: Impact Processes
This image is of the ejecta blanket of the Tooting Crater in the northern hemisphere of Mars.

Tooting is a "rampart" crater that is roughly 29 kilometers (18 miles) in diameter and appears to be one of the youngest craters of this size. A rampart crater is one where the material ejected from the crater during impact forms lobes that end with a low ridge, or rampart. One indication of Tooting Crater's youth is its ratio of depth to width. As a crater ages, the walls of the crater will tend to erode and debris will accumulate in the crater's floor making its apparent depth less, while also making its width larger.

One of the major features of Tooting Crater are its multiple ejecta layers that build a sequence of ramparts. The shapes of these ramparts suggest that the ejected material acted as a fluid (like mud) as it moved across the surface. Most researchers think that such fluid ejecta indicates that there was ice in the ground when the crater formed.



Written by: Shawn D. Hart  (8 July 2009)

This is a stereo pair with ESP_013023_2040.
 
Acquisition date
12 May 2009

Local Mars time
15:03

Latitude (centered)
23.869°

Longitude (East)
207.057°

Spacecraft altitude
286.5 km (178.1 miles)

Original image scale range
60.2 cm/pixel (with 2 x 2 binning) so objects ~181 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
18.6°

Phase angle
52.4°

Solar incidence angle
66°, with the Sun about 24° above the horizon

Solar longitude
264.3°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  319.5°
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ADDITIONAL INFORMATION
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Black & white is 5 km across; enhanced color about 1 km
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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL-Caltech/UArizona

POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.