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 there. The place is important for its contribution to the educational development of Mount Morgan and is a prominent community focal point and gathering place for social and commemorative events with widespread community support. 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