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 Rushmore in popular culture Rich family has their own version of Mount Rushmore, named Mount Richmore in the movie, built on their property with their own faces sculpted into it. It becomes the setting for the film's finale, echoing the finale of "North by Northwest". The WWE had their own version of Mount Rushmore consisting of the best wrestlers in the company's history. The ones sculpted into the mountain are The Undertaker, Steve Austin, John Cena, and Hulk Hogan. The memorial was famously used as the location of the climactic chase scene in Alfred Hitchcock's 1959 movie "North by Northwest". The scene was developed