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 Mitchell State Park the main trail at this point and it is one of the highest elevation perennial streams in the Appalachians, flowing through the Spruce-Fir forest. Openings here in the forest surrounded by evergreens resemble such openings near treeline in higher mountain ranges. The park also serves as the finish line for The Assault on Mount Mitchell and the midpoint for the Mount Mitchell Challenge ultramarathon. Mount Mitchell State Park Mount Mitchell State Park is a North Carolina state park in Yancey County, North Carolina in the United States. Established in 1915 by the state legislature, it became the first state park