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Showing results for tags 'middle cenomanian'.
Heteromorph posted a topic in Fossil Hunting TripsIn November 2018 I found a site in the Middle Cenomanian Tarrant Formation. Parts of the site were in the Lewisville member of the Woodbine. In the Lewisville I only found a few common bivalves, but the Tarrant produced multiple large concretions packed with ammonites, plant material, fish bones, and some unknowns. Some of the largest concretions were about 2 meters by 2 meters by 2/3 meter thick. But of course sizes and shapes varied. The concretions were a bit crunchy on their weathered exteriors, but in their blue interior they were harder than concrete. Lots of weathered ammonites covering the concretions, but when broken open the concretions' blue showed how well the ammonites inside were preserved. Their shells had been replaced with (I think?) calcite, so they were nicely shiny. Most of the ammonites seemed to be Acanthoceras amphibolum and Tarrantoceras sp. On March 1, 2020 I got a trailer and bobcat to, with the landowner's permission, haul a few giant concretions home. I did, and they are sitting in my barn. It would take years of preparation for one person, but there are probably some cool things in them. I hauled off around 2 tonnes of concretions, at least. Here are some pictures, spanning November 2018 to March 1, 2020. November 2018. FIG. 1-2: Concretion size. FIG. 3: Fossil wood. FIG. 4-7: Fossil hash. FIG. 8: Dog for scale. May 2019. FIG. 9: More hash. FIG. 10: Too much to carry... May/June 2019: Close-ups at home. FIG. 11-13: Same rock with close-up on wood with boreholes. FIG. 14: Ammonites and fish-bits hash. FIG. 15-16: Two different rocks. FIG. 17: Plant material. March 1, 2020. FIG. 18: The haul home.