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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Biological Alteration of Beachrock on Grand Cayman Island, British West Indies
ABSTRACT
Submerged sheets of beachrock at two localities on Grand Cayman Island, British West Indies are actively being eroded and transformed by pelecypods, polychaete annelids, an unidentified annelid(?), sipunculid worms, spionid worms, algae, sponges and fungi(?). Certain elements of the biota, such as the sponges, serve a purely destructive role whereas other elements, such as the polychaete annelids and algae, serve both a constructive and destructive role. The final result of the biological activity is a limestone that bears little resemblance to the original beachrock.
ALTERATION BIOLOGIQUE DE DEPOTS DE PLAGE INDURES DE L'ILE GRAND CAYMAN, INDES-OCCIDENTALES
RESUME
Des depots de plage indures planaires et sous-marins en deux endroits de l'ile Grand Cayman, sont erodes et transformes par des lamellibranches, annelides polychetes, annelides (?) non-identifies, vers a siphoncle, vers "spionid", algues, eponges et champignons (thallophytes). Certains membres biotiques, tel que les eponges, ont un role strictement destructif, alors que d'autres, tel que les annelides polychetes et les algues, ont un role destructif aussi bien que constructif. Le produit de l'activite biologique est un calcaire qui ressemble peu aux depots de plage indures d'origine.
Traduit par A. Zolnai
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