This kind of preservation is largely found in dinosaur fossils within the Jurassic Morrison Formation, a sedimentary rock formation found in Wyoming, Utah and Colorado. [Image via http://imgur.com/gallery/2OFmi]
Prehistoric Gardens, a roadside attraction in Oregon.
With the rise of the interstate highway system
in the 1950s, and a large number of people who had cars for the first time, a lot of attention getting attractions at the side of major roadways developed.