Shatter cones

Shatter cones

. The shatter cones that are found in the vicinity of many terrestrial craters provide evidence for shocks associated with the impact of a cosmic object. They point towards the direction of impact, like the cone-shaped plugs of glass that are often formed when a bullet strikes a window. The shatter cones shown here are about 0.05 meters in height. They are from the Wells Creek Tennessee Basin, a crater that is about 14 thousand meters across and roughly 200 million years old.

Copyright 2010, Professor Kenneth R. Lang, Tufts University