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Green Flats Reef

Reef in the Bronx, New York

About

Green Flats is a reef in City Island Harbor, between City Island and Rat Island. It is part of the Pelham Islands.

The reef is composed of mostly small round glacial alluvial rocks and a number of glacial erratics made of granite. It is covered in green seamoss and kelp. Like all true reefs, it is completely underwater (and a hazard to navigation) at high tide and visible at low tide.

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