🦖🪨☄️💀

#hell creek formation #K-Pg Extinction #chicxulub impactor #dinosaur extinction #late cretaceous #tyrannosaurus rex #triceratops #end of mesozoic

🔥💧🦴⏳

#hell creek formation #hell creek name #late cretaceous #K-Pg boundary #geological formation #fossil bed #end of mesozoic