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On the basis of a mineral survey, a geologic terrane in north-central New Hampshire having an area of at least 300 sq mi has probable potential for the occurrence of tin resources. This terrane covers all of the Sandwich Range Roadless Area, approximately the eastern two thirds of the Pemigewasset Roadless Area, a large part of the Presidential Range-Dry River Wilderness, and the southern part of the Dry River Extension Roadless Area. If major tin deposits occur in New Hampshire, they are probably associated with the Mesozoic Conway Granite. Tin resources in the New Hampshire terrane may also occur in small but high-grade veins, as at the old Jackson tin mine; and in iron-beryllium deposits that are low grade with respect to tin but richer in iron, beryllium, lead, zinc, and silver, as at the old Iron Mountain mine. The resource potential for uranium, tungsten, and niobium in the same and other parts of the area investigated cannot be evaluated frpm present data. The nature of the geologic terrain indicates little likelihood of the occurrence of organic fuels.
Additional Publication Details
WILDERNESSES AND ROADLESS AREAS IN WHITE MOUNTAIN NATIONAL FOREST NEW HAMPSHIRE.
Geological Survey Professional Paper (United States)