Allegheny Plateau

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Allegheny Plateau,

dissected plateau, western part of the Appalachian Mts., extending c.500 mi (800 km) SW from N Pa. to SW Va., rising to c.4,860 ft (1,480 m) at Spruce Knob, the highest peak in West Virginia. The E Allegheny Plateau, known as the Allegheny Mountains or the Alleghenies, has a steep eastward-facing escarpment often called the Allegheny Front (c.1,500–1,600 ft/460–490 m high) and is more rugged than the western portion. The plateau, formed by the folding of sedimentary rocks, has been subsequently reduced by erosion. The mountains, rich in coal and timber, also contain iron ore, petroleum, and natural gas.

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This cascading stream, sometimes called Beech Bottom Run, is among the most picturesque to grace the remote, rugged depths of north-central Pennsylvania's Allegheny Plateau. Found at the Forrest H.

last look

As an outflow of Cazenovia Lake, Chittenango Creek descends the north margin of the Allegheny Plateau through a narrow valley, which constricts into a gorge where the falls are today.

Chittenango Falls

While fracking goes on all across the country, the Marcellus Shale, a layer of sedimentary bedding under the Allegheny plateau that spans nine northeastern and Mid-Atlantic States, has become America's primary fracking grounds.

Dear EarthTalk: I have heard that fracking is becoming a major environmental issue in the U.S. Which parts of the country are already hosting fracking operations? Are there efforts underway to stop the practice in specific states or across the country?

The text includes an introductory overview of key geologic concepts and the geographic history of Maryland, Delaware, and Washington, DC; sections covering the Allegheny Plateau, Valley and Ridge and Blue Ridge Provinces, Piedmont Province, and Coastal Plain; and a glossary of terms.

Roadside geology of Maryland, Delaware, and Washington, D.C.

Kleinman's work started in New York's Allegheny Plateau (see map), a forested expanse broken up by small dairy farms, where the University Park team oversees activities in the Town Brook Watershed as part of the Conservation Effects Assessment Project (see story on page 10).

There's more than one way to save the bay

Landscape features such as the Appalachian Mountains and the Allegheny Plateau lend to Pennsylvania's different species compositions and forest types (McWilliams et al.

Pennsylvania roundwood purchases and movements by origin and destination

34-147)," Ohio Uplands--The Allegheny Plateau" (pp.

Roadside Geology of Ohio

Situated on the Allegheny Plateau near the Maryland border, Aurora was a popular destination for Washington, D.C., and Baltimore residents because of its cool climate, multitude of outdoor activities and easy access by rail and car.

Photographer encouraged by the first lady: National Geographic photographer got his start with sale to first lady Eleanor Roosevelt

Outside Pennsylvania, not many people know that the Keystone State has its own "Grand Canyon," the 1,000-foot-deep Pine Creek Gorge cutting 50 miles through the Allegheny Plateau. And until recently, few Pennsylvanians knew that their state had its own drill-everywhere energy plan, one that included the gorge among approximately 500,000 acres of state forest and park land being auctioned to natural-gas interests.

Keystone capers. (Pennsylvania)

As legend would have it, Johnny Appleseed lit out for the Allegheny Plateau 200 years ago to stake a claim and snag his share of the American Dream.

Frontiers

Headwater riparian habitat is abundant in the nonglaciated Allegheny Plateau of northwestern Pennsylvania.

Influence of inundation potential and forest overstory on the ground-layer vegetation of Allegheny Plateau riparian forests

This stream, which originates in the foothills of the Allegheny Plateau in the southwestern corner of New York State, is one of the most biologically diverse aquatic systems in the northeast.