A paleontological analysis includes archival research and a look at the geology of the area, as some rock formations have a greater potential to produce fossils. Archival research is conducted through resources such as the Denver Museum of Natural History and local educational institutions to determine if paleontological remains have been found near the area in the past.

The top photograph to the right shows the fossil during excavation. The other photos are of what is probably the upper jaw and teeth and a selection of paddle or fin bones as prepared for display.

The holes visible on the jaw are from old teeth. Mosasaurs shed their teeth and replaced them in a manner similar to sharks. The reverse of this specimen has rows of developing teeth.

The find was significant in that it is the westernmost record of a Tylosaurus in the Western Interior seaway and that it was found high in the Pierre Shale geological formation suggesting an age of late Campanian. The Pierre Shale formation is known to hold abundant fossils and has been the location of two previous Mosasaur records in the Trinidad area.

The fossil itself is interesting as it exhibits a possible infection and a few shark bite marks. The fossil is currently being prepared for display at the Louden-Henritze Archaeology Museum, at the Trinidad State Junior College, where it will join an existing Mosasaur fossil display. The new display is scheduled for completion by April 1st, 2001.

Mosasaur fossil photos published by permission of the Louden-Henritze Archaeology Museum, Trinidad State Junior College, Trinidad, CO.