Wilson collected specimens from the Eocene Willwood Formation in Wyoming, the Miocene Pawnee Creek Formation in Colorado, and the Eocene/Oligocene White River Group in Colorado. Koerner focused on the ...

Hyaenodon, extinct carnivorous mammals, late Eocene to middle Miocene. (Florilegius/Universal ... been a chilly change from the greenhouse-like Oligocene, and ended with a prolonged period of ...

Scientists have discovered a nearly complete skull of a Hyaenodonta, a hypercarnivore that that lived during the Oligocene Epoch some 20 million years ago. Scientifically known as Bastetodon syrtos, ...

By contrast, the earlier Eocene ... change from the greenhouse-like Oligocene, and ended with a prolonged period of glaciation, too. But through much of the Miocene, it was a warm world compared ...

Gingerich, P.D. Environment and evolution through the Paleocene-Eocene thermal maximum. Trends in Ecology and Evolution 21, 246-253 (2006). Harrison, T. Late Oligocene to middle Miocene ...