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There is evidence in northeastern Maine for at least two glacial phases represented by two tills. The older till unit is the St. Francis, a blue-gray deposit observed in the St. John and Hammond Brook Valleys. At Golden Rapids, the St. Francis till is overlain by a younger brown till with a different clast lithology. The surface of the St. Francis till section at Hammond Brook exhibits a weathered zone, 30 to 45 cm thick, and is overlain by approximately 6 m of stratified sediments.

Erratics of Canadian Shield provenance in the surface till indicate advance of the Laurentide Ice...

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