I found this today and it's got me confused. As someone who digs a lot of holes often, I've never come across something like this before. Found on the north shore of eastern Long Island. I have practiced flint knapping in my free time and it seems to have a lot of similar characteristics to some...
http://www.treasurenet.com/forums/hard-rock-mining/348469-got-rock-you-want-identified-post-here-gimme-good-picture-3-4-a.html
Just here for the Rocks y'all have questions on!