Lunar Flows

Bright rock material (talus) flows in the lunar crater Dionysius. Image: NASA/GSFC/Arizona State University

This looks like flowing water, but no this is the moon.  Most of what we are looking at is material disturbed by the impact that created Dionysius, some if it is from other geologic processes.  This flow is on the eastern side of the crater (see the link above)

There is a large image and a detailed description of the scene at the LROC site.