INVESTIGADORES
DEL PAPA Cecilia Eugenia
artículos
Título:
Palynology and Paleoenvironment of the "Faja Gris" Mealla Formation (Salta Group) atGarabatal Creek (NW Argentina)
Autor/es:
MIRTA QUATTROCCHIO; WOLFGANG VOLKHEIMER; CECILIA DEL PAPA
Revista:
PALYNOLOGY
Editorial:
AMER ASSOC STRATIGRAPHIC PALYNOLOGISTS FOUNDATION
Referencias:
Año: 1997 vol. 21 p. 231 - 247
ISSN:
0191-6122
Resumen:
An integrated biochronological and physical stratigraphic ap- proach was used as the basis to determine the stratigraphic position of the "Faja Gris" of the Mealla Formation at Garabatal Creek, NW Argentina. The relative dryness that influenced the sediments and the palynological assemblage of the "Faja Gris" can be correlated with an episode of relative low sea level in the marine Atlantic basins during the Riochican Land Mammal Age (Middle to Late Paleocene). The comparison of fossil genera with extant taxa permits recognition of several paleocommunities, namely marsh, lacus- trine, fluvial, montane forest, cloudy forest, transitional forest and steppe. The megaspore species Grapnelispora evansii has its youngest and northernmost occurrence in the Mealla Formation. Based on the palynological and sedimentological results, the analyzed profile would be located on the calcareous pelite plain environment defined by Gomez Omil et al. (1989) for the "Faja Gris."
