Eocene Willow Leaf from The Green River Formation

Name: Family: Salicaceae: Salix cockerelli

Age: Eocene

Size (25.4 mm = 1 inch): Leaf: 67 mm by 10 mm Matrix: 92 mm by 60mm

Location: Green River Formation, Uintah County, Utah

Description: The Green River Formation deposits of Wyoming, Colorado, and Utah are best known for their immaculately preserved fish, but other examples are known as well, as this specimen attests. This is an example of a leaf from a tree of the Willow family. The deep brown color is a fine contrast to the light shale matrix. The presence of these trees is indicative of the lakeside environment in which they lived.

click fossil plant images to enlarge

Fossil Museum Navigation:
Geological Time Paleobiology Geological History Tree of Life
Fossil Sites Fossils Evolution Fossil Record Museum Fossils