Sideling Hill - Maryland

Sideling Hill is a syncline mountain.

Sideling Hill is a long, steep, narrow mountain ridge in the Ridge-and-Valley (or Allegheny Mountains) physiographic province of the Appalachian Mountains. It spans Washington County in western Maryland, as well as adjacent parts of West Virginia and Pennsylvania, USA. The highest point on the ridge is Fisher Point, which reaches an elevation of 2,310 feet (700 meters).

Sideling Hill is a syncline mountain, formed in a region of downward-folded (synclinal) rock strata situated between two upfolded anticlines. The ridge is capped by erosion-resistant conglomerate and sandstone from the Mississippian (early Carboniferous) geologic age, specifically the Purslane Sandstone of the Pocono Formation. The slopes of the ridge are composed of much more easily eroded rock types, including the Devonian-Mississippian Rockwell Formation. Long, narrow valleys run parallel to the ridge on either side, accentuating its distinctive topography.