Stone Mountain, Georgia a member of Main Street America. Stone Mountain is located at (33.805255, -84.171413), at the western base of the quartz monzonite dome monadnock of the same name. While Stone Mountain city proper is completely within DeKalb County, the postal regions designated, and traditionally considered as Stone Mountain include portions of DeKalb and Gwinnett Counties. According to the State of Georgia, the city has a total area of , of which 0.62% is water. According to 2017 US Census Bureau estimates , Stone Mountain has 6,368 residents, a 9.0% increase since 2010. There are 2,519 households with an average of 2.42
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.