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Multi-ringed basin

  (Redirected from Multi-ringed impact basins)

A multi-ringed basin (also a multi-ring impact basin) is not a simple bowl-shaped crater, or a peak ring crater, but one containing multiple concentric topographic rings;[1] a multi-ringed basin could be described as a massive impact crater, surrounded by circular chains of mountains.[2] As such, a multi-ring basin slightly resembles a bull's-eye, may have an area of many thousands of square kilometres.[3]

An impact crater of diameter bigger than about 180 miles (290 km) is referred to as a basin.[4]

Mare Orientale, on Earth's Moon

The design of multi-ring basinsEdit

In adjacent rings, the ratio of the diameters approximates 2:1 ≈ 1.41 to 1.[5][6]

FormationEdit

To start, a peak ring crater has

  • one peak-ring, i.e., a crater rim, which is generally circular, and
  • a mountainous region which surrounds the basin center.

A multi-ringed basin has an important difference, which is multiple peak-rings.

In extremely large collisions, following the impact the rebound of the surface can obliterate any trace of the initial impact point. Usually a peak ring crater has a high structure with a terrace, and has slump structures inside of it. There are new theories about the lunar mare called Mare Orientale on Earth's Moon, as to how it formed.[7]

Multi-ring basins are some of the largest, oldest, rarest and least understood of impact craters. There are various theories to explain the formation of multi-ringed basis, however there is currently, there is no consensus.[8][9]

ExamplesEdit

See alsoEdit

ReferencesEdit

  1. ^ Head, J. W. (January 2010). "Transition from complex craters to multi-ringed basins on terrestrial planetary bodies: Scale-dependent role of the expanding melt cavity and progressive interaction with the displaced zone" (PDF). Geophysical Research Letters. 37 (2): L02203. Bibcode:2010GeoRL..37.2203H. doi:10.1029/2009GL041790.
  2. ^ "Lunar Landforms Teacher Page". Hawai'i Space Grant Consortium, Hawai'i Institute of Geophysics and Planetology, University of Hawai'i. 1998. Retrieved 18 January 2019.
  3. ^ "Multiringed basin". Encyclopedia Britannica. February 1, 2018. Retrieved January 20, 2019.
  4. ^ Parrish, Alton (October 29, 2016). "How Multi-Ring Craters Form Revealed by New Research". Ideas, Inventions And Innovations. Retrieved January 20, 2019.
  5. ^ "Multi-Ring Basin". Encyclopedia.com. Retrieved January 20, 2019.
  6. ^ Martellato, Elena (January 31, 2011). The importance of being a crater: A tool in planetary surface analysis and datation (PDF) (PhD Thesis). Università degli Studi di Padova. Retrieved January 20, 2019.
  7. ^ Stacey, Kevin (October 27, 2016). "Research helps explain formation of ringed crater on the Moon". News from Brown. Retrieved 20 January 2019.
  8. ^ Potter, Ross W.K. (November 2015). "Investigating the onset of multi-ring impact basin formation" (PDF). Icarus. 261: 91–99. Bibcode:2015Icar..261...91P. doi:10.1016/j.icarus.2015.08.009.
  9. ^ Stuart Ross Taylor (1982). "Meteorite impacts, craters and multi-ring basins" (PDF). Planetary Science: A Lunar Perspective. Lunar and Planetary Institute. Retrieved 19 January 2019.
  10. ^ McKinnon, W. B.; Alexopoulos, J. S. "Some implications of large impact craters and basins on Venus for terrestrial ringed craters and planetary evolution". KT Event and Other Catastrophes. hdl:2060/19940023803.
  11. ^ Chu, Jennifer (October 27, 2016). "Retracing the origins of a massive, multi-ring crater". MIT News. Retrieved 20 January 2019.

External links and referencesEdit