Early Silurian vs. Late Ordovician glaciation in South America

The San Gabán Diamictite Formation of southern Peru is a lateral equivalent of the Cancaniri Diamictite Formation in Bolivia and the Zapla Diamictite Formation of northern Argentina. New palynomorph biostratigraphy determined the age of the unit as Llandovery and therefore synchronous with the glaci...

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Bibliographic Details
Main Authors: Díaz-Martínez, E., Vavrdová, M. (Milada), Isaacson, P. E., Grahn, C. Y.
Format: Conference Object
Language:English
Published: 2011
Subjects:
glaciation
Gondwana
Llandovery
Silurian
South America
Argentina
Ice Sheet
Online Access:http://hdl.handle.net/11104/0202381
Description
Summary:The San Gabán Diamictite Formation of southern Peru is a lateral equivalent of the Cancaniri Diamictite Formation in Bolivia and the Zapla Diamictite Formation of northern Argentina. New palynomorph biostratigraphy determined the age of the unit as Llandovery and therefore synchronous with the glaciomarine record of adjacent intracratonic basins of South America. Early Silurian glaciation in South America supports the small ice-sheet hypothesis and the isotopic evidence for glaciation-related short-term climatic changes in the Early Silurian.

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