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The region is a large broad ridge with a steep ascent from east to west and rolling hills away from the ridge. The Allegheny Front reaches its highest elevation in Pennsylvania at Blue Knob, 3,136 feet (956 m), an unusual bulge along this symmetrical ridgeline. Streams that cut into the ridge are often shallow and steep.
The Valley and Ridge Province was formed during the Alleghanian orogeny, a mountain-building event that occurred between 325 and 260 million years ago. [2] The rocks in the region were subjected to immense pressure and heat, causing them to deform and fold.
The range of the Allegheny Mountains is part of the Ridge-and-Valley Appalachians, a physiographic region of the much larger Appalachian Mountain Range. From northeast to southwest, with ridges and summits of the Eastern Continental Divide in italics: [specify] Bald Eagle Mountain, Pennsylvania; Wopsononock Mountain, Pennsylvania; Brush ...
The ridge line runs north from Rocky Gap State Park in Maryland, across the Mason–Dixon line into Pennsylvania and then to the west Martin Hill, passing very near Tussey Mountain in Snake Spring Valley. The ridge then turns west, wrapping around north of Bedford, Pennsylvania to its intersection with Dunning Mountain, dividing Dunning Cove ...
Brush Mountain is a stratigraphic ridge in the Appalachian Mountains of central Pennsylvania, United States, lying east of the Allegheny Front and west of Tussey Mountain.It runs along the southeast side of the Little Juniata River and forms a horseshoe around Sinking Run, and is the westernmost ridge in its section of the Ridge-and-valley Appalachians.
The Allegheny Front forms part of the Appalachian Structural Front, separating the Appalachian Plateau from the Appalachians' Ridge and Valley Province. [1] The various other escarpments along this structural feature include the Catskill Escarpment to the northeast and the Cumberland Escarpment to the southwest. [1]
Blue Mountain, Blue Mountain Ridge, or the Blue Mountains of Pennsylvania is a ridge of the Appalachian Mountains in eastern Pennsylvania.Forming the southern and eastern edge of the Ridge-and-Valley Appalachians physiographic province in Pennsylvania, Blue Mountain extends 150 miles (240 km) from the Delaware Water Gap on the New Jersey border in the east to Big Gap in Franklin County in ...
The gaps of the Allegheny, [1] [2] meaning gaps in the Allegheny Ridge (now given the technical name Allegheny Front) in west-central Pennsylvania, is a series of escarpment eroding water gaps (notches or small valleys) along the saddle between two higher barrier ridge-lines in the eastern face atop the Allegheny Ridge or Allegheny Front ...