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The Ramapo Fault forms the western boundary of the Newark Basin. It is the surface location of the fault between basement blocks of Precambrian bedrock shown in orange. New Jersey, eastern Pennsylvania, and southeastern New York are divided geologically into four physiographic provinces, each distinctive in their
The Piedmont in Pennsylvania is divided into three distinct sections: the Piedmont Uplands, the Piedmont Lowlands, and the Gettysburg-Newark Lowlands. Much of the Piedmont is becoming urbanized and developed. Some of the best farmland in the state is in this region, specifically Lancaster and Chester counties.
The line of the distant peaks approximates the level of a peneplain that was uplifted to form the plateau. Aerial view of Allegheny Plateau terrain surrounding Weston, West Virginia The Allegheny Plateau is a physiographic section of the larger Appalachian Plateau province, which in turn is part of the larger Appalachian physiographic division.
The Allegheny Ridge is prominently shown in the map center-left, the gaps of the Allegheny Front are located in the border area between Cambria County (uplands) and Huntingdon County (lowlands). USGS - Appalachians Mountain chain showing the lines of the barrier ridges in central, western, and northwestern Pennsylvania.
An 1836 map of Pennsylvania's counties The Federal Information Processing Standard (FIPS) code, used by the U.S. government to uniquely identify counties, is provided with each entry. FIPS codes are five-digit numbers; for Pennsylvania the codes start with 42 and are completed with the three-digit county code.
The Endless Mountains region includes Bradford, Sullivan, Susquehanna, and Wyoming counties. The highest peak in the region is the North Knob of Elk Mountain at 2,693 feet (821 meters). The dissected plateau is a subrange of the Appalachian Mountains .
Outcrop of the Devonian Catskill Formation with a well-displayed thrust fault, located about 3 miles west of the village of Juniata Crossing on the north side of Route 30, Bedford County, Pennsylvania. Fossil coral of the Devonian Keyser Formation in the New Enterprise New Paris Quarry, Chestnut Ridge Bedford County, Pennsylvania.
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.