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Glaciated Low Allegheny Plateau

Ecoregion in Appalachian Mountains, Allegheny Plateau in NY, PA

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The Glaciated Low Plateau (60a) is a mosaic of farmland, woodlots, and lakes upon low, rolling hills. The terrain has been glacially smoothed, stream gradients are low, and the valleys are open. Hilltop elevations are commonly 1,300-1,800 feet (395-550 m), and are often lower than those of adjacent ecoregions. Local relief is typically 300-500 feet (91-153 m). The growing season varies inversely with elevation, increasing from 100 days in the northwest to 160 days in the southeast. A corridor that is “favored from a climatic standpoint” (Murphy and Murphy, 1937, p. 371) bisects The Glaciated Low Plateau ecoregion along the entrenched Susquehanna River at elevations of less than about 820 feet (250 m).

— EPA

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