Onon (crater)
 Onon crater, as seen by HiRISE. Scale bar is 500 meters long. | |
| Planet | Mars |
|---|---|
| Coordinates | 16°18′N 257°36′W / 16.3°N 257.6°W |
| Quadrangle | Amenthes |
| Diameter | 3.5 km |
| Eponym | Town in Mongolia |
Onon is an impact crater on Mars, located in the Amenthes quadrangle at 16.3° N and 257.6° W. It measures 3.5 kilometer in diameter and was named after Onon, a town in Mongolia.[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] 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.
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CTX camera (on Mars Reconnaissance Orbiter) image of Onon Crater and area around it. Arrow indicates Onon Crater.
See also
- Impact crater
- Impact event
- Inverted relief
- List of craters on Mars
- Ore resources on Mars
- Planetary nomenclature
References
- ^ "Gazetteer of Planetary Nomenclature | Onon". usgs.gov. International Astronomical Union. Retrieved 4 March 2015.
- ^ http://www.lpi.usra.edu/publications/slidesets/stones/
- ^ Hugh H. Kieffer (1992). Mars. University of Arizona Press. ISBN 978-0-8165-1257-7. Retrieved 7 March 2011.
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