MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Palinología de la Formación Monte Chico (Cretácico Tardío) de la Provincia de Santa Cruz, Argentina: Esporas
Autor/es:
POVILAUSKAS, L.
Revista:
REVISTA BRASILEIRA DE PALEONTOLOGIA
Editorial:
SOC BRASILEIRA PALEONTOLOGIA
Referencias:
Año: 2011 vol. 14 p. 255 - 255
ISSN:
1519-7530
Resumen:
PALYNOLOGY OF THE MONTE CHICO FORMATION (LATE CRETACEOUS) OF SANTA CRUZ PROVINCE, ARGENTINA: SPORES. Diverse palynological assemblages composed by both continental and marine palynomorphs were recovered from the Monte Chico Formation, Late Cretaceous, Santa Cruz Province. In this contribution palynological assemblages were studied. The samples were taken from the all section of this unit. Fifty eight species of spores were herein identified. They belong to the genera: Baculatisporites, Biretisporites, Camarozonosporites, Ceratosporites, Cicatricosisporites, Clavifera, Concavissimisporites, Converrucosisporites, Cyathidites, Cyatheacidites, Deltoidospora, Dictyophyllidites, Foveosporites, Echinosporis, Gabonisporis, Gleicheniidites, Interulobites, Ischyosporites, Klukisporites, Kuylisporites, Laevigatosporites, Leiotriletes, Leptolepidites, Neoraistrickia, Ornamentifera, Peromonolites, Perotriletes, Polypodiidites, Punctatosporites, Reticuloidosporites, Retitriletes, Rouseisporites, Rugulatisporites, Stereisporites, Trilites, Trilobosporites, Tuberculatosporites and Verrucosisporites. On the basis of the stratigraphic distribution of the identified species, mainly in Argentina and Antarctica, joined with the presence of Camarozonosporites ohaiensis and Ischyosporites volkheimeri, a Maastrichtian age is here suggested. The palynological assemblages obtained would typically indicate a nearshore marine environment with more marginal conditions towards to the upper section.