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The surface bedrock of mt. marcy, new york, is composed primarily of which rock?

User Albus
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The answer is Anorthosite. This is a kind of intrusive igneous rock composed mainly of calcium-rich plagioclase feldspar. All anorthosites located on Earth contain of rough crystals, but some illustrations of the rock reserved from the Moon are outstandingly crystalline. 
User Parroty
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