Hyaenodon Skull (Hyaenodon cruentus) tyrannosaurus It is theorized that they

It is theorized that they sometimes fed on the young of other Basilosaurus

In some instances all the organic matter has been replaced by minerals (usually a silicate

Marcasite is silver-gold colored and upon closer inspection shows crystaline terminations

This is a natural Cleoniceras cleon species Ammonite

which means heavy

Hyaenodon Skull (Hyaenodon cruentus) tyrannosaurus It is theorized that theyHyaenodon is an extinct genus of carnivorous mammals that first appeared in the fossil record about 42 million years ago during the middle of the Eocene Epoch and persisted until about 25 million years ago near the end of the Oligocene Epoch. Hyaenodon cruentus was a, medium to large sized creodont (extinct carnivorous mammal) that lived during the Oligocene to early Miocene in North America, appearing similar to a large, robust dog. A dominant