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Tug Hill Transition

Ecoregion in NY

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The Tug Hill Transition ecoregion contains sloping topography and escarpments surrounding the flat core of the Tug Hill Plateau. The eastern boundary of the ecoregion is fairly distinct at an escarpment over the Black River Valley. In the west, the plateau increases in elevation very gradually from the Ontario Lowlands (83c). The Tug Hill Transition shares the same wet climate as the Tug Hill Plateau, but it differs in its geology and soil. The sandstone forming the core area of the plateau is surrounded on three sides by a band of siltstone and shale. Soil derived from siltstone and shale is relatively more suited to cultivation than that from sandstone. As a result, the land use pattern around the perimeter of the heavily forested core of the plateau changes to a farm and woodlot mosaic. In the contact area between the sandstone and shale, deep gorges have formed from stream activity eroding the weaker shale, and waterfalls mark the change in rock type.

— EPA

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