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The Geologic History of Long Island Sound

The Geologic History of Long Island Sound. 500 million years ago. Volcanoes form in a now extinct ocean. 450 million years ago. Volcanic islands crash into what will be North America forming the bed rock of Long Island and L.I. Sound. 300 million years ago. Long Island Sound is a swamp

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River forming - PowerPoint PPT Presentation

The Geologic History of Long Island Sound