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Caption: The three stages of coral development illustrated by section drawings of the same island. As the island subsides, the fringing reef builds up into a barrier reef and then becomes an atoll as the land itself sinks below sea level. Darwin and the Beagle by Alan Moorhead, page 237.
Credit: Album / TopFoto
Image size: 4692 × 2590 px | 34.8 MB
Print size: 39.7 × 21.9 cm | 1847.2 × 1019.7 in (300 dpi)