This is an amazing example of a synclinal fold in the basin an | Geology of the world and the Environment

This is an amazing example of a synclinal fold in the basin and range Province of the Appalachians. It's a synclinal fold Sideling Hill , Sideling Hill (also Side Long Hill) is a long, steep, narrow mountain ridge in the Ridge-and-Valley (or Allegheny Mountains) physiographic province of the Appalachian Mountains, located in Washington County in western Maryland and adjacent West Virginia and Pennsylvania, USA. The highest point on the ridge is Fisher Point, at 2,310 feet (700 m) in Fulton County, Pennsylvania.

Sideling Hill is a #syncline mountain, in a region of downward-folded (synclinal) rock strata between two upfolded #anticlines. The ridge is capped by an erosion-resistant conglomerate and sandstone of Mississippian (early #Carboniferous) geologic age, the Purslane Sandstone of the Pocono Formation. The ridge's slopes are formed of much more easily #eroded kinds of rock, including the Devonian-Mississippian Rockwell Formation, with long, narrow valleys paralleling the ridge on either side, The #rocks at the cap of the roadcut are the Early Mississippian-aged Purslane Sandstone, more resistant to weathering than surrounding rocks, allowing the ridge to form. The Late #Devonian to Early Mississippian-aged Rockwell Formation, a mixture of #conglomerate, #sandstone, siltstone, shale, and even coal, underlies the Purslane Sandstone

Note : synclinal structure: Often described as a "downfold" or "trough" or "concave fold," a syncline is perhaps best defined as a fold which has the youngest beds in the core or center of the fold.

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