Astronomy:Lockyer (Martian crater)

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Lockyer
LockyerMartianCrater.jpg
Location of Lockyer Crater
PlanetMars
CoordinatesCoordinates: 27°50′N 160°31′E / 27.84°N 160.51°E / 27.84; 160.51
Diameter71.35 km

Lockyer is a crater in the Elysium quadrangle of Mars. It was named after Norman Lockyer, a British astronomer (1836-1920).[1] Lockyer is surrounded by relatively smooth plains, where there are few craters. It is east of Elysium Mons and Hecates Tholus, two large volcanoes. It is south of the larger crater Adams and the Phlegra Montes.

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]

See also

References

  1. "Lockyer". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  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. https://books.google.com/books?id=NoDvAAAAMAAJ. Retrieved 7 March 2011.