I recently collected quite a few artifacts from a privately owned piece of property located in the Debeque Colorado area. I beleive most of the pieces (knives, drills, hand axes, projectile points, ect.) to be of late Paleo Indian Age. Specifically, Foothills Mountain Complex. A significant portion of the artifacts were knapped from source material that contains the fossil type represented in the photo. I cannot identify the species. I find it very interesting that tool stone containing this particular fossil was apparently utilized over the same material without this fossil. Tool stone contai