Western face of Mount Moran, Teton Range, Wyoming

Image of the western face of Mount Moran. Note the dark stripe that marks a mafic intrusion (the “diabase dike”) and the vestiges of the Cambrian-aged Flathead Sandstone Formation (about 50 vertical feet in thickness) at the summit. USGS photo by Phil Stoffer (https://www.usgs.gov/media/images/grand-tetons-national-park-17).