What is Kenny pointing at here?

Why, it’s a boulder. Where did it come from? Look uphill:

This is as perfect an example of root wedging as I’ve seen!

Spotted it last Friday along the C&O Canal towpath.
What is Kenny pointing at here?

Why, it’s a boulder. Where did it come from? Look uphill:

This is as perfect an example of root wedging as I’ve seen!

Spotted it last Friday along the C&O Canal towpath.