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 Central State School Mount Morgan Central State School Central State School is a heritage-listed state school at 44 Morgan Street, Mount Morgan, Rockhampton Region, Queensland, Australia. It was built from 1887 to 1997. It is also known as Boys School. It was added to the Queensland Heritage Register on 21 October 1992. The Central State School at Mount Morgan was opened in 1887 with an enrolment of 58 pupils, but this number rapidly grew and the first extension was begun the following year. Other buildings have been added as the school continued to expand. Both boys and girls have been taught at the