Search results
Results from the WOW.Com Content Network
The Ridge-and-Valley Appalachians, also called the Ridge and Valley Province or the Valley and Ridge Appalachians, are a physiographic province of the larger Appalachian Highlands division. The physiographic province is divided into three sections: the Hudson Valley, the Central, and the Tennessee. [1]
Folded rock layers of the Valley and Ridge in Georgia, as well as their flat-lying equivalents in the Appalachian Plateau, include limestone, sandstone, shale and other sedimentary rocks. Many of these rocks serve as important economic resources in the state, including construction-grade limestone, barite , ochre and small amounts of coal . [ 5 ]
The rocks of the Valley and Ridge province formed over millions of years, in the Iapetus. Shells and other hard parts of ancient marine plants and animals accumulated to form limey deposits that later became limestone. This is the same process by which limestone forms in modern oceans.
These rocks lie north of the Furlong fault which is an offshoot of the larger Chalfont fault. [11] Buckingham Mountain rises south of the valley and comprises quartzite. The other ridge is less prominent and is underlain by the conglomerates of the Stockton Formation. Karst is a localized problem in this area.
The northwestern border of the county is approximately at the Allegheny Front, a geological boundary between the Ridge and Valley Province and the Allegheny Plateau (characterized by relatively flat-lying sedimentary rocks of late Paleozoic age). (PA Geological Survey Map 13)
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 ...
It is a major ridge-former in the Ridge-and-Valley Appalachians of the eastern United States. [3] The Pottsville Formation is conspicuous at many sites along the Allegheny Front, the eastern escarpment of the Allegheny or Appalachian Plateau.
Oblique air photo of Massanutten Mountain, looking southwest. The south fork of the Shenandoah River is visible to the left, as well as a part of the Blue Ridge Mountains. Massanutten Mountain is a synclinal ridge in the Ridge-and-Valley Appalachians, located in the U.S. state of Virginia. The original Native American name for the ridge is ...