reefless

The diverse marine habitats include coral reefs, reefless rock bottoms, sandy bottoms and mangrove inter-tidal flats.

Coiba National Park and its Special Zone of Marine Protection, Panama 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

While it's hard to say with certainty that the changes in ocean chemistry were the chief cause of extinction of any reef building groups, many of the reefless periods do coincide with periods of altered seawater chemistry as does the appearance of the Corallimorpharians.

RealClimate 2009

I am far from wishing to say that the islands of the great oceans have not subsided, or may not continue to subside, any number of feet, but if the average duration (from all causes of destruction) of reefs on the same spot is limited, then after this limit has elapsed the reefs would perish, and if the subsidence continued they would be carried down; and if the group consisted only of atolls, only open ocean would be left; if it consisted partly or wholly of encircled islands, these would be left naked and reefless, but should the area again become favourable for growth of reefs, new barrier-reefs might be formed round them.

More Letters of Charles Darwin — Volume 2 Charles Darwin 1845