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from the Paleocene of North Dakota
The best nodules are a by-product of coal strip-mining operations
most notably in the 378
The microconch is variably tuberculate commonly with double row of umbilical tubercles or bullae
Yorktown Formation (Miocene)
Jurassic Morrison Torvosaurus(?) Tooth VF-JC-24-002 Agatized from the Paleocene of NorthTorvosaurus(?) sp. Morrison Formation Upper Jurassic Moffat County, Colorado Here is a fine dinosaur tooth that we have interpreted to belong to the genus Torvosaurus. The tooth is 4 cm long and 2. 1 cm wide at the base. It is somewhat recurved. It has 3 serrations per millimeter which is small for an adult Torvosaurus, however the serration characteristics are certainly not Allosaurus and unlike Ceratosaurus or Marshosaurus. The mesial carina does
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