Incomplete circle
Have you noticed something else interesting about this crater? This is an amazing feature! The circumference of the rim of the crater has two ends that do not connect. I spent a lot of experiments with sand and powder, trying to figure out what shape is obtained from the blows. Theoretically and practically no impact, no volcanic activity, this configuration can not create, define the shape of the crater left "theory eksudatatsii magma and collapse of the interior." I do not think that it is durable. When we see how they work on the rim of crater, "X-drones, and broken-off pieces equal to the distance between the rim spaced lines, then the answer is obvious - the form of the crater is determined by those who inhabit the moon.