</font><font color="blue" class="small">( What is "Ledge" ?
Whatever it is, it appears to be extremely hard and capable of making a grown man and his tractor cry. Not to mention change the plans they had.
Mike )</font>
Ledge is large outcroppings of rocks that are so huge and so big that it is impossible to move them in one piece with any piece of equipment known to modern man. When road builders encounter it, they drill and blast to move it. It doesn't move at the base when it is blasted. I don't know of anyone that has ever been able to get to the base of "ledge", because it is like a iceberg. What you see on the top is only a small fraction of the total. When I built my home, there was a small pinnacle of ledge that stood 4' high and was about 12" round at the base. A D-11 bulldozer was unable to break it off! /forums/images/graemlins/frown.gif We moved the location of the house to get around it.
You are correct that it isn't the proper geological term for it, but I have no idea what a geologist would call it either. Around here, we just call ledge a problem....
In this first picture, I will call this the "face" of the ledge. Many of the rocks that I have dug out, appear to be pieces of "ledge" that have been broken off possibly when the glaciers moved through this area millions of years ago.