Castle Rock 2
Castle Rock rises above a field along the South Fork of the Shoshone River southwest of Cody Wyoming. The feature is an erosional remnant of volcanic dikes that intruded into the sedimentary country rock. Explorer, mountain man and trapper, John Colter, passed this landmark in 1807 while exploring the wilderness that was to become northern Wyoming. He is believed to be the first European-American to visit this feature. The volcanic dike, as well as the nearby stacked lava flows, flow breccias and debris flows that makeup the mountains behind Castle Rock are part of the Absaroka Volcanics Supergroup. This group of igneous rocks are the remnant of a volcanic field that was active in the Eocene between 53 and 43 million years ago.
Castle Rock 2
Castle Rock rises above a field along the South Fork of the Shoshone River southwest of Cody Wyoming. The feature is an erosional remnant of volcanic dikes that intruded into the sedimentary country rock. Explorer, mountain man and trapper, John Colter, passed this landmark in 1807 while exploring the wilderness that was to become northern Wyoming. He is believed to be the first European-American to visit this feature. The volcanic dike, as well as the nearby stacked lava flows, flow breccias and debris flows that makeup the mountains behind Castle Rock are part of the Absaroka Volcanics Supergroup. This group of igneous rocks are the remnant of a volcanic field that was active in the Eocene between 53 and 43 million years ago.