I was hoping someone would recognize this odd assortment of shapes and point me toward a reference. The were all collected from the same road cut on Highway 89 not to far from Smoot, Wyoming. The paper in the picture is 8.5X11 inches (roughly 20X30cm). They are notable because they are large pieces in a matrix that a least on the surface fragments into small pieces. There were alot of curved pieces that are about an inch thick with a very regular curvature like broken pieces of ceramic pipe. Thanks!