| Pilot Butte Dam is located in the Wind River Basin of west central Wyoming. Bedrocks, in ascending order are Pre-cambrian gneiss and metasediments, Paleozoic to Cretaceous sediments, Eocene-age Wind River sandstones, terrace gravel and modern alluvium. The older folded and faulted sedimentary bedrocks are oil-bearing. The nearest known active fault is 35 miles east of the site. |
