Eberswalde Crater Delta

In the top half of today's VIS image is the delta deposit on the floor of Eberswalde Crater. The channel that supplied the water is also visible. Deltas are formed when sediment laden rivers slow down - either due to a flattening of topography, or entering a standing body of water. The reduction in velocity causes the sediments to be deposited. The main channel often diverges into numerous smaller channel that spread apart to form the typical fan shape of a delta. The Eberswalde Crater delta is one of the best preserved on Mars. Eberswalde Crater is 62km in diameter (38 miles).