Stone Mountain the second Ku Klux Klan in 1915. It was purchased by the State of Georgia in 1958 "as a memorial to the Confederacy." Stone Mountain Park officially opened on April 14, 1965 – 100 years to the day after Lincoln's assassination. It is the most visited destination in the state of Georgia. Stone Mountain is more than in circumference at its base. The summit of the mountain can be reached by a walk-up trail on the west side of the mountain or by the Skyride aerial tram. Stone Mountain is a pluton, a type of igneous intrusion. Primarily composed of
Stone Mountain (Pennsylvania) fossils. Across the Kishacoquillas Valley, on the opposite side of the Jacks Mountain anticline, the same rock layers are repeated in reverse order on Jacks Mountain. Stone Mountain (Pennsylvania) Stone Mountain is a stratigraphic ridge in central Pennsylvania, United States, trending northwest of the Jacks Mountain ridge and Jacks Mountain Anticline. The ridge line separates Kishacoquillas Valley from the Seven Mountains area. Stone Mountain lies in, and the ridge line forms part of the border between, Mifflin and Huntingdon counties. Pennsylvania Route 305 crosses the ridge and follows a valley along a fault line at near Greenwood Furnace State Park.