Cataclysm at Meteor Crater: Crystal sheds light on Earth, moon, Mars July 26, 2016. In molten sandstone extracted by prospectors a century ago, an international team of scientists has discovered microscopic crystals telling of unimaginable pressures and temperatures when an asteroid formed Meteor Crater in northern Arizona some 49,000 years ago.

Aug 09, 2016 · Wisconsin ice-margin positions (Laurentide Ice Sheet) ... For more information about the Ice Age geology of Wisconsin or to download a ... crafted from a Swedish Meteorite ...