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Topographic map showing the deep, narrow gorge of the Mohawk River at Little Falls. The walls of the gorge rise fully 50 feet above the river which is less than 400 feet above sea level. The gorge is postglacial in origin and before the great ice age it was replaced by an important divide with one stream (Mohawk River) flowing eastward and another stream flowing westward. Part of Little Falls (U. S. G. S.) quadrangle. Scale, about 1 mile to the inch.]