Gledhill is an impact crater in the Hellas quadrangle of Mars, located at 53.2°S latitude and 87.1°E longitude. It is 78.5  km in diameter. It was named after British astronomer Joseph Gledhill, and the name was approved in 1973 by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN).[1]

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] Gledhill Crater shows a central peak in a picture on this page.

See also

References

  1. ^ "Gazetteer of Planetary Nomenclature | Gledhill". usgs.gov. International Astronomical Union. Retrieved 4 March 2015.
  2. ^ "Stones, Wind, and Ice: A Guide to Martian Impact Craters".
  3. ^ Hugh H. Kieffer (1992). Mars. University of Arizona Press. ISBN 978-0-8165-1257-7. Retrieved 7 March 2011.


Allikas: https://en.wikipedia.org/wiki/Gledhill_(crater)
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