related tags: 302F31 5F5448 6A553C 8C7459 9B8A71 A6753F B18D5B B3A895 C1AC86 ceratopsian ceratopsians county creek cretaceous dinosaur dinosaurs formation fossil fossils garfield getaway hc256 locality maastrichtian montana site skull skulls stage subadult triceratops trike 303030