 |
| This view is of Mount Moran near Jackson Lake Junction. The Teton Range rises nearly 6,000 feet above the valley. The mountain range is a great fault-block mountain with a fault great escarpment on its eastern side. The range consists of Precambrian-age metamorphic rocks (gneiss and schist) and granite. Mount Moran is highlighted by a great volcanic dike near its peak. The summit is capped by a relatively thin layer of Cambrian-age Flathead Sandstone. East of the mountain front, Flathead Sandstone occurs buried deep within Jackson Hole by nearly 25,000 feet of sedimentary rocks and sediments. Mountain ranges began to form in the region during the Laramide Orogeny beginning about 70 million years ago, however, the modern Teton Range began to rise about 9 million years ago and is still rising. |
 |
 |