K-Ar ages on hornblende-andesite from the Sierra de Perijá, western Venezuela
Published:January 01, 1984
Gideon Steinitz, William B. Maze, 1984. "K-Ar ages on hornblende-andesite from the Sierra de Perijá, western Venezuela", The Caribbean-South American Plate Boundary and Regional Tectonics, William E. Bonini, Robert B. Hargraves, Reginald Shagam
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Whole-rock K-Ar ages of 155 ± 5 m.y. and 146 ± 7 m.y. were obtained from two hornblende-andesite flows associated with the Jurassic La Quinta Formation of northwestern Venezuela and are in agreement with others reported for this formation. These data provide age control on stratigraphic relationships and paleomagnetic measurements.