Reiner crater, located at 6.9°N, 305.0°E, in Oceanus Procellarum, is Eratosthenian in age because it does not have a visible, high-reflectance ejecta ray system like Copernicus or Tycho craters. Today's Featured Image focuses on the southern wall of Reiner crater. The flows emplaced along the crater wall are reminiscent of some impact melt features seen on the Moon. They are elongate, slightly lobate, and have many boulders that could have weathered out of them. And they do appear to have flowed downwards into the crater, solidifying on the wall before reaching the crater floor. But are the flows impact melt?
The elongate morphology of these flows is also similar to that of a dry debris flow. Impact melt would only have the chance to flow downhill once before solidifying, but the flows appear to have been deposited successively during multiple flow periods. Furthermore, the flows also cut through loose material on the crater wall, indicating that the flows formed more recently. These relationships are perhaps more consistent with dry debris flows, than impact melt flows.
Can you find more flows in the full NAC frame?
Related Posts: Dry debris or liquid melt?
Posted by Drew Enns on August 08, 2011 09:00 UTC.