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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 56 (1972)

Issue: 1. (January)

First Page: 107

Last Page: 113

Title: Anomalous Crust Beneath West Florida Shelf

Author(s): Harold L. Krivoy (2), Thomas E. Pyle (2) (3)


A new Bouguer gravity anomaly map of the west Florida continental margin reveals a landward salient of high positive values in the vicinity of St. Petersburg. A 20,000 sq km area of the shelf characterized by anomalies greater than +30 mgal is thought to be underlain by a crust having a thickness intermediate between that of continents and that of oceans. A transition from oceanic toward continental crust in this area may have been accomplished by reef progradation across an ancient oceanic embayment. Alternatively, a transition from continental toward oceanic crust may have been produced by rotation of Florida and consequent rifting. The reef-progradation hypothesis is most consistent with what is known of the deep structure and tectonic setting of the Florida platform.

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