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
Rushmore Memorial Library the National Register, but both applications failed. In 2008, with help from New York's Office of Parks, Recreation and Historic Preservation, they were successful. Rushmore Memorial Library The Rushmore Memorial Library, also known as the Rushmore Memorial Building, is located at the junction of NY 32 and Weygant Hill Road in Highland Mills, New York, United States. It is a small Arts and Crafts-style stone building constructed in the 1920s with a donation from Charles E. Rushmore, a local resident for whom Mount Rushmore is also named. It served as the Town of Woodbury public library until the mid-1980s, when