Figure 2.
Unsightly drill holes mar a classic exposure of hummocky cross-stratified sandstone in the Cretaceous Blackhawk Formation of Tuscher Canyon, near Green River, Utah. Credit: D. Stolz.
Unsightly drill holes mar a classic exposure of hummocky cross-stratified sandstone in the Cretaceous Blackhawk Formation of Tuscher Canyon, near Green River, Utah. Credit: D. Stolz.