Loysburg Gap is a

water gap A water gap is a gap that flowing water has carved through a mountain range or mountain ridge and that still carries water today. Such gaps that no longer carry water currents are called wind gaps. Water gaps and wind gaps often offer a pract ...

where

Pennsylvania Route 36 Pennsylvania Route 36 (PA 36) is a long state highway located in the U.S. state of Pennsylvania. The southern terminus is at Pennsylvania Route 26, PA 26 near the Hopewell Township, Bedford County, Pennsylvania, Hopewell Township community of Y ...

and the Yellow Creek pass through

Tussey Mountain Tussey Mountain is a stratigraphy, stratigraphic ridge in central Pennsylvania, United States, trending east of the Bald Eagle Mountain, Bald Eagle, Brush Mountain (Blair County, Pennsylvania), Brush, Dunning Mountain, Dunning and Evitts Mountai ...

near Loysburg in Bedford County,

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

, United States. Yellow Creek flows eastward through the gap towards its junction with the Raystown Branch of the

Juniata River The Juniata River () is a tributary of the Susquehanna River, approximately long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed August 8, 2011 in central Pennsylvania. The river is ...

Periglacial Periglaciation (adjective: "periglacial", referring to places at the edges of glacial areas) describes geomorphic processes that result from seasonal thawing and freezing, very often in areas of permafrost. The meltwater may refreeze in ice wedg ...

boulder fields are present on both sides of the water gap, and the boulders are formed of the

Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...

Tuscarora Formation The Silurian Tuscarora Formation — also known as Tuscarora Sandstone or Tuscarora Quartzite — is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia, US. Description The Tuscarora is a thin- to thick-bedded fine-gra ...

.Atlas of preliminary geologic quadrangle maps of Pennsylvania, Map 61, Pennsylvania Geological Survey, Compiled and edited by Thomas M. Berg and Christine M. Dodge, 1981. ''Hopewell'' Quadrangle (Compiled by D. M. Hoskins, 1976)

External links

Periglacial Boulders at Loysburg Gap
video about the boulders at Loysburg Gap

References

Landforms of Bedford County, Pennsylvania Water gaps of Pennsylvania {{BedfordCountyPA-geo-stub