Mount Rushmore community. Recent pine beetle infestations have threatened the forest. Mount Rushmore is largely composed of granite. The memorial is carved on the northwest margin of the Black Elk Peak granite batholith in the Black Hills of South Dakota, so the geologic formations of the heart of the Black Hills region are also evident at Mount Rushmore. The batholith magma intruded into the pre-existing mica schist rocks during the Proterozoic, 1.6 billion years ago. Coarse grained pegmatite dikes are associated with the granite intrusion of Black Elk Peak and are visibly lighter in color, thus explaining the light-colored streaks on the
Mount Philo State Park Mount Philo State Park Mount Philo State Park is a state park located in Charlotte, Vermont. The park protects the area around Mount Philo (968 feet high) and provides views of Lake Champlain and the Adirondack Mountains to the west. The Green Mountains (including Camel's Hump in the winter) can be seen to the east and south. It is accessed by trail or steep narrow car road (seasonal). The park features hiking trails that lead from the base to the summit of Mount Philo. There is a mountaintop picnic area with views of Lake Champlain, the valley, and the Adirondack