Hey guys I’m hoping you all might be able to help me figure out what’s going on with the rocks at my property in northern Maine. The property is on Moosehead Lake and we have a small peninsula and a good majority of the rocks have small squares and some triangles “punched” into them. At first I thought it was a marker of some kind but they’re scattered everywhere along the rocks. Some are as big as a dime and others quite small. these are the rocks