Alcide D'Orbigny in Argentina: the Beginning of Stratigraphical Studies and Theories on the Origin of the "Pampean Sediments"

Abstract

The stratigraphy and theories on the origin of the "Pampean Sediments" are described. The terms "terrains pampéens" and "argile pampéennes" introduced by Alcide d'Orbigny have been used for more than 170 years. During this period, the theories and hypotheses on the origin and antiquity of the sediments and their faunas have changed. They have been considered marine or continental in origin, and to be Cretaceous to Pleistocene in age. This sequence and its paleontological content are currently form the basis of the chronological scheme for the last two million years in southern South America.

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