Quistes de dinoflagelados (Cladopyxiaceae, Gonyaulacaceae, Goniadomaceae e incierta) del Oligoceno-Plioceno temprano de la cuenca del Colorado, Argentina

GULER, GUERSTEIN

Revista Española de Paleontología

Sociedad Española de paleontología

Lugar: Madrid; Año: 2003 vol. 18 p. 23 - 47

0213-6937

The aim of this paper is to describe and illustrate the Oligocene to Pliocene dinoflagellate cysts assemblages from Fx-1 and Dx-1 wells and Barranca Final Formation type section. Fx-1 and Dx-1 wells were drilled offshore northern Colorado Basin and the Neogene Barranca Final Formation type section crops out in the southern margin of the basin. The assemblages are diverse and very well preserved. A total of 41 dinoflagellate cyst taxa have been described. 1 species belongs to family Cladopyxiaceae, 29 species to Gonyaulacaceae, 2 species to Goniodomaceae, and 9 species are included in uncertain family. Labyrinthodinium truncatum subsp. truncatum, Cleistosphaeridium ancyreum, Cannosphaeropsis quattrocchiae and other species with biostratigraphically significant last occurrences, were useful for stratigraphical subdivision in the Mid-Cenozoic of the Colorado Basin. Cousteaudinium aubryae, Tectadonium pellitum, Habibacysta tectata, Bitectatodinium tepikiense, Spiniferites falcipedius are reported for the first from Argentina. Operculodinium sp. 1, Operculodinium sp. 2, Operculodinium sp. 3, Impagidinium sp. 1, Imagidinium sp. 2, Imapagidinium sp. 3, Spiniferites cf. falcipedius and Unipontidinium sp. Present distinctive morphologies and are potentially new species.