- Stone Mountain (Pennsylvania)
Infobox Mountain
Name = Stone Mountain
Photo =
Caption =
Elevation = 2192 ft /668 m
Location =Pennsylvania , USA
Range =Appalachian Mountains
Prominence =
Coordinates = coord|40|32|55|N|077|50|34|W|type:mountain_region:US|display=inline
Topographic
USGS Allensville (PA) Quadrangle
First ascent =
Easiest route =Stone Mountain is a stratigraphic
ridge in centralPennsylvania ,United States , trending northwest of theJacks Mountain ridge and Jacks MountainAnticline . The ridge line separatesKishacoquillas 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 coord|40|37|46|N|77|45|31|W nearGreenwood Furnace State Park . Allensville Road also crosses the ridge crest north of Allensville, and Barrville Road passes through awind gap west of Barrville. There are nowater gap s carrying rivers through the ridge. TheSaddler Creek passes the southern foot of the ridge near the town of Mill Creek.Geology
Just below the ridge crest lies the contact between the older
Ordovician Juniata Formation on the southeast slope, and the younger more erosion resistantSilurian Tuscarora Formation geologic layer forming the steeper northwest slope and the crest. The Bald Eagle Formation crops out on the Kishacoquillas Valley-facing slopes of Stone Mountain, forming a steep topographic bench below the Juniata Formation. Below the Bald Eagle Formation, the uppermost sandstone layer of the underlyingReedsville Formation containbrachiopods and other marinefossils . Across the Kishacoquillas Valley, on the opposite side of the Jacks Mountain anticline, the same rock layers are repeated in reverse order onJacks Mountain .References
* [http://geonames.usgs.gov/pls/gnispublic Geographic Names Information System] , Feature ID: 1193474.
* USGS Allensville and Mc Alevys Fort 7.5-Minute Quadrangles
*
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