Zhamanshin is a meteorite crater in Kazakhstan. It is in diameter and the age is estimated to be 900,000 ± 100,000 years (Pleistocene). The crater is exposed at the surface. Description 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 a nuclear winter, but it was not sufficiently large enough to have caused a mass extinction. Preliminary papers in the late 1970s suggested either Elgygytgyn, or Zhamanshin, as the source of the Australasian strewnfield. References Impact craters of Kazakhstan Pleistocene impact craters Pleistocene Asia Aktobe Region