Thanks Rob. Crowley's Ridge is mean as hell raw, but sweet heat treated (as this stuff is). There is really no such thing as "Crowley's Ridge flint" because it is all Plestiocene gravels that came form Michigan (and other locales) on down to Arkansas and a little south. The archeologists have another name for it that escapes me, but glaciers and glacial streams carried it down here. This is all what I call the "peanut butter" colored stuff. Heat treated to 450 or so, it knapps like a dream., but is is TOUGH raw. I like it. Few rocks are larger than a potato, but it is easily collected from Crow Creek in Madison, Arkansas. Let me know if any of you guys are coming through and I'll tell you where to look. There is an endless supply.