Abstract

Seismic-reflection and magnetic profiles across three topographic highs in the western end of the Straits of Florida and southeastern Gulf of Mexico reveal the presence of diapiric structures which have magnetic anomalies greater than 100 ^ggr. These deep-water knolls may be related to the volcanic-anomaly belt of the Florida platform, the ultramafic rock outcrops of northwestern Cuba, or Cretaceous andesitic intrusive rocks of Yucatan and Florida.

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