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 Morgan State High School Mount Morgan State High School Mount Morgan State High School is a heritage-listed state high school and technical college at 4 Central Street, Mount Morgan, Rockhampton Region, Queensland, Australia. It was built in 1908. It was formerly known as Mount Morgan Technical College. It was added to the Queensland Heritage Register on 4 December 2015. Mount Morgan State High School was established in the central Queensland mining town of Mount Morgan in 1912, as one of Queensland's first secondary schools. It commenced operating on the Mount Morgan Technical College site, which the two institutions shared until 1964. The former Technical