Actually it's ledge. A chunk the size of a big beach ball is in the wrong place - right where we'd like to build a retaining wall. East TN by the way I don't know what kind of rock it is - around here they use the big hammers on big excavators to beat such things to pieces. I have access to a 14" concrete saw and a sledge hammer. What are my chances of cutting and beating it up by hand. I'd rather not just give it a try, if it didn't work the defaced rock would be a permanent reminder and opportunity for jokes at my expense.