View Full Version : Sink Holes?

John Kierein
2004-Apr-28, 01:28 AM

Charlie in Dayton
2004-Apr-28, 01:56 AM
Very tiny meteorite impact sites?

This is suggested by the image I recall from a PBS special concerning Gene Shoemaker's research. He'd simulate meteorite impacts by firing a rifle down into sand. Very coarse sand gave something that looks very much like what's in that picture...