IGEBA 23946
INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
FINDINGS OF INTRAFORMATIONAL STRIATED PAVEMENTS IN THE LATE CARBONIFEROUS GLACIAL DEPOSITS OF THE ANDEAN PRECORDILLERA, ARGENTINA
Autor/es:
PABLO JOAQUIN ALONSO MURUAGA; CARLOS O. LIMARINO; LUIS A. SPALLETI; FERRAN COLOMBO PIÑOL; PABLO JUAREZ
Revista:
LATIN AMERICAN JOURNAL OF SEDIMENTOLOGY AND BASIN ANALYSIS
Editorial:
Asociación Argentina de Sedimentología
Referencias:
Año: 2012 vol. 18 p. 151 - 157
ISSN:
1669-7316
Resumen:
We describe two subglacial basal contact surfaces found in the lower part of theGuandacol Formation in the Central Precordillera (northwestern Argentina).According to paleontological (palynological) information, and some radiometric dating, the age of the glacial deposits is Late Visean-Early Bashkirian and therefore fits into the LPIA 2 interval of Isbell et al. (2003b). The presence of intraformational glacial pavements in the Guandacol Formation allows for a more precise history of the LPIA 2 glacial interval suggesting that interglacial periods not only separated lowfrequency climatic changes (LPIA intervals) but also were likely present within individual LPIA periods (high-frequency climatic changes).
