Mount Rushmore National Memorial Statue

描述

Mount Rushmore National Memorial is a massive sculpture carved into Mt. Rushmore in the Black Hills region of South Dakota. Completed under the direction of Gutzon and Lincoln Borglum from 1927–1941, the sculpture's roughly 60-ft.-high granite faces depict U.S. presidents George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln. Polystone is a compound made up largely of polyurethane resin mixed with powdered stone additives that give it added weight and the porcelain or "stone-like" feel that resulted in the materials name itself. Polystone is durable and highly effective at maintaining a sharp paint finish.