New age tor the vitrophyric rhyolite-dacite from Ancud (42°S), Chiloe, Chile

• Autores: Charles R. Stern, Mario Vergara Martínez
• Localización: Revista geológica de Chile: An international journal on andean geology, ISSN 0716-0208, ISSN-e 0717-618X, Vol. 19, Nº. 2, 1992, págs. 249-251
• Idioma: inglés
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• Resumen

  • Vergara and Munizaga (1974) reported an age of 760,000 years for a sample of rhyolite-dacite obsidian from the mainly late Oligocene to Miocene Central Valley volcanic belt at Ancud, Chiloe (Fig. 1). They interpreted this sample as representing “a last and isolated volcanic event in this series”.