[djf]

Thats an interesting feature. I’m not sure what the geological name is but odds are its something I’ve seen before.

Sometimes when you habe an area where water runs over the bedrock, a small pebble or boulder can kind of get “stuck” at or near a low point.

As time goes on, it slowly moves around, and as it moves, the friction wears down the spot it’s in, so it gets deeper and deeper.

There’s a place in a river canyon about twenty miles from me where the bedrock is littered with these holes - some maybe only five inches wide and eight inches deep - some large enough you can climb down into!

[Fred Nerks]

And then there also other features:

Glacial Striations

Crescentric Gouges

Glacial Grooves

[gleeaikin]

What you describe sounds a lot like Ausable Chasm in upper New York state. Found those little holes quite fascinating.