Wind River Canyon, Wyoming

The Gros Vetre Shale; three visible kink-folds penetrate the exposed layers at this outcrop (Dead Indian Hill).

Interbedded Limestone

Trace Fossils; abundant evidence of bioturbation

Precambrian granite and the Flathead Sandstone -visible in a roadcut near Cody, Wyoming. The gap betweens formations here represents the "great unconformity" which separates the Precambrian from the Cambrian -1.2 billion years of earth's history, missing.

The Flathead Sandstone, interbedded with laminated shale.