The heart of South Africa’s shabby Vredefort crater lurk curious black and green rocks. This is all that remains of the magma sea, once filled the hole in the ground, say Desmond Moser Western University of Ontario city of Canada. Vredefort crater ten-formed 2.02 billion years ago, and since then, of course, it did not spare the time.
Education called Vredefort was once very different. Its original diameter is estimated at 300 km. Asteroid or meteoroid, please Africa had probably 10 km in diameter and dug a hole, the depth of which is ten times larger than the Grand Canyon, says Mr. Moser. Read the rest of this entry »