FOSSIL MICROPLANKTON OF TERTIARY AND CRETACEOUS SEDIMENTS FROM THE NORTHEHN TIERRA DEL FUEGO (ARGENTINA)

Carlos A Menéndez

Abstract


Several planktonic organisms, spores and pollen grains have been isolated from Tertiary and Cretaceous sediments of a 2000 m bore located at Tierra del Fuego, approximately 14 kilometers south of the San Sebastián Bay (5~)0 25' lat. S, 68° 15 long. W). In this first paper about fossil microplankton, have been described part of the -ísolated microfossils. They are two new spccies of Deflandrea, two of Hystrichosphaeridium, one of Micrhystridium, Odontochitina aff. porifea Cookson, and Hystrichosphaera furcata (Ehrenberg) O. Wetzel.

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