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The Upper Oligocene of Antigua: the volcanic to limestone transition in a limestone Caribbee

2014; Wiley; Volume: 30; Issue: 4 Linguagem: Inglês

10.1111/gto.12061

1365-2451

Stephen K. Donovan, Trevor A. Jackson, David A. T. Harper, Roger W. Portell, Willem Renema,

Geology and Paleoclimatology Research

Antigua is a small island at the northern end of the Lesser Antilles chain. Its geology is largely limited to the Upper Oligocene and it records with unusual fidelity the transition from island arc volcanism to quiescence and limestone deposition. Despite the apparent limitation of a rock record confined to a short stratigraphical interval, Antigua has a geodiversity that ranges from thick andesites through silicified logs and freshwater snails in cherts to limestones that include both shallow and deeper water facies, and fine karstic features.