Escalante (Martian crater)

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Escalante Crater
Escalante Crater Wall.JPG
Escalante Crater Wall, as seen by HiRISE. Picture on left is enlargement of the one on right. Scale bar is long.
Planet Mars
Coordinates 0°12′N 244°42′W / 0.2°N 244.7°W / 0.2; -244.7Coordinates: 0°12′N 244°42′W / 0.2°N 244.7°W / 0.2; -244.7
Eponym Mexican astronomer F. Escalante

Escalante Crater is an impact crater in the Amenthes quadrangle of Mars. It is located at 0.2° N and 244.7° W. It is 79.3 km (49.3 mi) in diameter, and was named after Mexican astronomer (c. 1930) F. Escalante.[1]

Map of Amenthes quadrangle. The northwest part is the large impact basin Isidis. The crater Escalante sits right on the equator. 

Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak.[2] The peak is caused by a rebound of the crater floor following the impact.[3] If one measures the diameter of a crater, the original depth can be estimated with various ratios. Because of this relationship, researchers have found that many Martian craters contain a great deal of material; much of it is believed to be ice deposited when the climate was different.[4] Sometimes craters expose layers that were buried. Rocks from deep underground are tossed onto the surface. Hence, craters can show us what lies deep under the surface.

See also[edit]

References[edit]

  1. ^ Gazetteer of Planetary Nomenclature Feature Information
  2. ^ http://www.lpi.usra.edu/publications/slidesets/stones/
  3. ^ Hugh H. Kieffer (1992). Mars. University of Arizona Press. ISBN 978-0-8165-1257-7. Retrieved 7 March 2011. 
  4. ^ Garvin, J., et al. 2002. Global geometric properities of martian impact craters. Lunar Planet Sci. 33. Abstract @1255.