A Brief on Tyrannosaurus, Pterosaur and Baculite Fossils

Before starting anything, first, we have to know what fossils are? Fossils are the preserved remains impressions of any once living-thing from the past geological age. Only a small fraction of ancient organisms are preserved as fossils, and the organisms that have a solid and resistant skeleton are readily preserved. 

Fossils are important to us. They are tangible connections to life, landscapes and climates of the past. 


There are five different types of fossils that include:


  • Body fossils

  • Molds and casts

  • Petrification fossils

  • Footprint and trackways

  • Coprolites


Tyrannosaurus Fossil


Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex is one of the most well-represented of the large theropods. Their fossils are found in a variety of rock formations dating to the Maastrichtian age, 68 to 66 million years ago. 


Everything about Tyrannosaurus rex indicates the power of one of the largest theropod dinosaurs that ever existed. The first Tyrannosaurus fossil was recovered by a curator from the American Museum of Natural History- the legendary Barnum Brown.


Paleontologists have found that most of the Tyrannosaurus fossils in the Northwest in states such as Montana and South Dakota. These fossils have also been found in Alberta, Canada. 




Pterosaur Fossil


Pterosaurs were flying reptiles of the extinct clade or order Pterosauria. They existed 228 to 66 million years ago. There were two types of pterosaurs which include Basal pterosaurs and Later pterosaurs. Pterosaur skeletons were so delicate that they survived as fossils only when their corpses came to rest in a protected environment. 


Of all the fossils that ever lived on the earth, only a minuscule fraction died under the right conditions to be captured as fossils. 


Pterosaur fossils are also easily damaged when extracted, transported, or prepared for display or study. Preondactylus buffarinii is one of the oldest pterosaurs, dating back around 220 million years. 


Baculite Fossil


Baculites, the genus of extinct cephalopods found as fossils in Late Cretaceous marine rocks, formed from 99.6 million to 65.5 million years ago. Baculite fossils are very brittle and almost always break. They are commonly found broken in half or numerous pieces, usually along suture lines. 


Several species have been designated from the fossil record since the initial description of the genus in 1799:


  • Baculites anceps 

  • Baculites asper

  • Baculites capensis

  • Baculites kirki

  • Baculites fuchsi

  • Baculites rectus

  • Baculites ovatus

  • Baculites lechitides

  • Baculites meeki

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