Monday, May 23, 2011

May 2011

Photos from a trip to Eocene mammal fossil localities in Wyoming and Utah. Click on the photos to see a larger view. You can read about the trip at

Halfway Hollow in the Duchesne River Formation south of Utah Hwy 121. This locality has produced quite a number of micro-mammal bones and teeth. Many of these fossils are only a millimeter or two in size.

Stuck again, this time in the sand.

Sandstone hoodoo in Uinta Formation, Utah.

Along the White River south of Bonanza, Utah. The low light colored outcrops near the river on the right are the Green River Formation. All the rest of the outcrops are of the Uinta Formation. The Green River and Uinta Formations were deposited in lakes about 45-50 million years ago and contain a good fossil record of the animals and plants that lived in and around these lakes.

Van stuck in swelling clays of the Bridger Formation, Wyoming. Be careful where you drive when it's wet!

The Bridger Formation at Grizzly Buttes, southeast of Mountain View, Wyoming. The dark stripe near the bottom of the hills is the Henry's Fork Tuff bed that has an age of 46.9 million years. Thousands of fossil mammal bones and teeth have come from this area.

The Bridger Formation at Jackson Ridge along the Oregon/Mormon Trail in Wyoming. Site of numerous Eocene mammal fossil discoveries in the late 1800's. The fossils are about 48 million years old.

The Bridger Formation at Church Butte, Wyoming along the Oregon/Mormon Trail. Site of Eocene mammal fossil discoveries in the late 1800's.

Crab apple blossoms in our yard in Provo.
(All photos were taken by Urthman, and may not be republished without permission)