MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Palinología de la Formación Monte Chico (Cretácico Tardío) de la Provincia de Santa Cruz, Argentina: Gimnospermas
REVISTA BRASILEIRA DE PALEONTOLOGIA
SOC BRASILEIRA PALEONTOLOGIA
Año: 2012 vol. 15 p. 85 - 85
PALYNOLOGY OF THE MONTE CHICO FORMATION (LATE CRETACEOUS) FROM SANTA CRUZ PROVINCE, ARGENTINA: POLLEN OF GYMNOSPERMS. Palynological assemblages composed by continental and marine palynomorphs were recovered from the Monte Chico Formation, late Cretaceous, Santa Cruz Province. In this contribution palynological assemblages of gymnosperms were studied. The samples were taken from the all section of this unit. Sixteen species of pollen grains were here determined. They belong to the genera: Araucariacites, Classopollis, Cycadopites, Dacrycarpites, Gamerroites, Lygistepollenites, Microcachyridites, Phyllocladidites, Podocarpidites and Trisaccites. On the basis of the stratigraphic distribution of the identified species, mainly in Argentina and Antarctica, and joined with the preliminary analysis determinate of spores, a Maastrichtian-Late Maastrichtian age is here suggested. The palynological assemblages indicate a typically of shore environment of deposition, with continental conditions towards to the most upper part of section.