Craters on the Moon often develop granular flows on their walls as loose material slides towards the bottom. As this process occurs, the granular flows must overcome any obstacles in their path to reach the crater floor. Dionysius, an 18 km crater that lies on the western edge of Mare Tranquillitatis, is no exception.
Because the granular flow cannot go over the mound, it is being redirected along the mound's slope until it reaches the crater floor. The result is a spectacular arc that acts as a geologic contact between the granular flow on one side and impact melt on the other!
Are any other geologic features redirecting the granular flow in the full NAC frame?
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