Precambrian alaskite in the northwestern Adirondacks, New York, is a widely distributed and distinctive rock unit. Overlying the alaskite are, successively, a sequence of calcitic and dolomitic marbles, a sequence of biotitic and granitic gneisses, and a second sequence of carbonate-rich units. At least three periods of folding have deformed these rocks and have produced complex hook-shaped and elliptical interference structures. Understanding the elements involved in multiple folding and recognizing the setting of the alaskite relative to other rock units are essential to a regional understanding of the geology of the northwestern Adirondacks.

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