Eocene Fossils


The Eocene is the second epoch of the Cenozoic Era starting 55 million years ago and lasted 15 million years. Grasses began to to a major part of planetary flora and the interaction of grazers and grass had impact on evolution during the Cenozoic.

Green River Formation, Colorado and Wyoming

The Green River formation is exposed over large tracts of western Coloraco and Wyoming. Primarily shale, the deposits were laid down in fresh water lakes.

Kemmerer, Wyoming

Knightia eoceana

Diplomystus dentatus


Palisade, Colorado

Palm leaf

Possilbe sassafras leaf

Duchesne County, Utah

Garfish scales

Garfish scales? or possibly drum fish teeth