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North Mountain is a ridge primarily located in Davidson Township of Sullivan County in the U.S. state of Pennsylvania. Its summit is that county's highest point, the 10th highest among the state's 67 counties. Portions also extend into neighboring Lycoming, Luzerne, and Wyoming counties.〔http://www.harveyslake.org/gtnm/gtnm_complete.pdf〕 The mountain has a topographic isolation of . U.S. Route 220 passes near the mountain. The mountain once had a prolific population of animals, including grouse, deer (including white deer), and bears. Historic industries on and around North Mountain include lumbering and ice cutting. Pennsylvania Route 487 goes over North Mountain. The mountain is also home to a fire tower known as the North Mountain Fire Tower. ==Geography and geology== North Mountain extends over portions of three counties.〔 However, its highest point is in Sullivan County.〔 The mountain is part of the Endless Mountains, although it is slightly removed from the main body of these mountains. It is also on the eastern edge of the Allegheny Mountains. A 1920 book called the mountain the "monarch of hills". The same book also stated that it resembled Notre Dame.〔 The Loyalsock Valley is close to North Mountain.〔 The mountain has an area of approximately 250 square miles. Its average elevation is approximately . An extension of North Mountain in Davidson Township contains a plateau that is situated on the south side of Lopez Creek. An area consisting of approximately one third of North Mountain is known as Dutch Mountain.〔 The bedrock under the summit of North Mountain belongs to the Pocono Formation.〔 When the first settlers arrived in Davison Township, Sullivan County, they encountered a fertile plain at the base of the mountain.〔 A small coal bed is located on a cliff on the mountain, near Ganoga Lake. It is less than thick in places. The North Mountain plateau has anticlinal and synclinal axes that run north 75° east to south 75° west. There is also a nearby geological structure known as the Ganoga Basin, which runs between Spring Creek and North Mountain. The rock of the basin gently slopes northwards and southwards.〔 At one point, the mountain rises above the surrounding area. At that point, the horizontal distance is from the surrounding area to the peak is , giving the mountain a slope of approximately 0.46. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「North Mountain (Pennsylvania)」の詳細全文を読む スポンサード リンク
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