The Morrison Formation is composed of three members (listed from youngest to oldest): Brushy Basin, Salt Wash and Tidwell. Each has different characteristics due to changes in the depositional environment. This layer does not occur in Canyonlands.
Did You Know?
Lizards, including the colorful collared lizard, are one of the most frequently seen animals in Canyonlands. When not chasing flies or basking in the sun, they are often seen doing what appears to be push-ups. Scientists believe this and other behaviors signal dominance and facilitate courtship.