Zhamanshin crater

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Impact glass from the Zhamanshin impact site

Zhamanshin is a meteorite crater in Kazakhstan.

It is 14 km in diameter and the age is estimated to be 900,000 ± 100,000 years (Pleistocene). The crater is exposed at the surface.[1]

It is believed that the Zhamanshin crater is the site of the most recent meteorite impact event of the magnitude that could have produced a disruption comparable to that of nuclear winter, but it was not sufficiently large to have caused a mass extinction.[2]

Preliminary papers in the late 1970s suggested either Elgygytgyn[3] or Zhamanshin[4] as the source of the Australasian strewnfield.

References[edit]

  1. ^ "Zhamanshin". Earth Impact Database. University of New Brunswick. Retrieved 2009-08-20. 
  2. ^ Essay "Impact Cratering on Earth", based on: R.A.F. Grieve, 1990, Impact cratering on the Earth, Scientific American, v. 262, 66-73.
  3. ^ R.S. Dietz (1977), Elgygytgyn Crater, Siberia: Probable Source Of Australasian Tektite Field Meteoritics, June 1977, Vol 12, Issue 2, p. 145–157
  4. ^ B.P. Glass (1979), Zhamanshin crater, a possible source of Australasian tektites? Geology, July 1979, v. 7, p. 351-353

Coordinates: 48°24′N 60°58′E / 48.400°N 60.967°E / 48.400; 60.967