Proclus lava flow
I was exploring Proclus crater recently and spotted a diamond-shaped flow of lava in the south-western region which is shown below.
Proclus crater is about 28km in diameter and is one of the brightest craters on the Moon, second only to Aristarchus. It has a bright ray system which is asymmetric, probably caused by a shallow-angle impact.
NAC strip: M104211600RC Overview of lava flow.
Edge of lava flow showing cracks, melt pools and boulder erosion.
Has a good overview of the creation of Proclus crater and its asymmetric ray system.