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A few weeks ago I had the opportunity to look for fossils among additional Pierre Shale outcrops in the Sheyenne River Valley. I didn't post anything about that trip as it came up a bit short and read like my last Pierre Shale trip with more partial specimens. Today I went back to the area to look again, and also made it to an outcrop of the Gregory Member. Low water levels made for a great collection from the Gregory. The DeGrey was rather typical. The side of one of the so-called "Indian Mounds" of the DeGrey member and a frog which was hanging out on the mound. This p
I have an ambivalent relationship with the Pierre Shale. I try and try to find good sites that produce fossils but the end result is usually a fossil-less site. For a long time I quit trying exposures of Pierre Shale even though it's the closest fossil bearing exposure to where I live. About a year ago I decided to try the Pierre Shale again because it was close and I was too tired to go elsewhere, like the Fox Hills Formation in Central ND. Mostly I found worn Inoceramus fragments but to my surprise I found a nicely preserved caudal vertebrae from a mosasaur among float material. Following th