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The igneous and metamorphic crystalline basement rock of New York formed in the Precambrian and are coterminous with the Canadian Shield.The Adirondack Mountains, Thousand Islands, Hudson Highlands, and Fordham gneiss, along with outcrops in the Berkshires just over the state line in Massachusetts, are part of the Grenville Province, a large piece of continental crust which accreted to the ...
Manhattan schist outcrop in Central Park. In the United States, the Manhattan Prong of the New England Uplands is a smaller belt of ancient rock in southern New York (including Manhattan, the Bronx, and segments of Brooklyn and Staten Island), parts of Westchester County, and upland portions of southwestern Connecticut.
The most recent major geologic force that shaped New York's landscape into its current form was the movement of a glacier during the late Pleistocene, which began to recede from the region around 18,000 years ago, [6] leaving behind many characteristic landforms, such as the Hudson River, [6] the Finger Lakes, [7] and the Helderberg Escarpment.
Gore Mountain Garnet, found in the Adirondack Mountains in New York, contains the world's largest garnets. [1] [2] The rock that holds these garnets, garnet amphibolite, is sometimes referred to as 'black ore' or 'dark ore.' [1] [3] This rock formation formed during metamorphism during the Ottawan phase of the Grenvillian orogeny, and extremely high temperatures combined with introduction of ...
Shawangunk Ridge from south of New Paltz. The Shawangunk Ridge / ˈ ʃ ɑː w ə ŋ ɡ ʌ ŋ k /, also known as the Shawangunk Mountains or The Gunks, [1] is a ridge of bedrock in Ulster County, Sullivan County and Orange County in the state of New York, extending from the northernmost point of the border with New Jersey to the Catskills.
The entire region lies within Adirondack Park, a New York state protected area of over 6,000,000 acres (2,400,000 ha). The park was established in 1892 by the state legislature to protect the region's natural resources and to provide recreational opportunities for the public. It covers over 20 percent of New York state's land area. [5]