Tags: Crater.
Ritchey Crater is a crater in the Coprates quadrangle on Mars located at 28.8° South and 51° West. It is 79 km in diameter and was named after George W. Ritchey an American astronomer (1864-1945).Ritchey Crater is interesting to scientists because it displays several different layers. A dark layer at the top forms a cap rock that protects the underlying layers from erosion. Under this hard dark layer is a softer light-toned rock that breaks into small boulders.
