This view is of Mount Moran, elevation 12,065 in the central Teton Range. The very top flat part of the mountain is a caprock of Cambrian Flathead Sandstone that unconformably overlies the Precambrian crystalline rocks that make up the core of the Teton Range. On the east side of the Teton Fault that runs along the eastern range front, the Flathead Sandstone is offset vertically below the sedimentary cover in Jackson Hole by as much as 30,000 to 35,000 feet with most of this fault displacement probably having occurred in the past 9 million years (Love and others, 1973; Love, 1987; Love and others, 1992). |