MICROFOSILES CALCAREOS NO-MARINOS DEL CRETACICO SUPERIOR EN ZAMPAL, PROVINCIA DE MENDOZA, ARGENTINA

Abstract

The first part of the present paper gives an outline about the South Mendoza's Late Cretaceous stratigraphy with special reference to Zampal section. The "Piso del Ranquil" beds, Groeber 1929 (= Rayoso beds of South Mendoza sensu H. Doucloux, 1946) are correlated with the Neuquén Group from Neuquén Province. The second part deals with continental and brackish ostracods and charophytes -in part Maastrichtian- which are found in Zampal (Neuquén Basin - Andean Region). Aditional information about allied foraminifers is reported. Twenty eight species of ostracods, eight of charophytes and eight of foraminifers are recognized. Wolburgiopsis nov. gen. of Ostracoda, and 6 new species of Ostracoda and 2 new species of Charophyta are described for the first time. Information about presumed salinity of the best represented ostracods and charophytes and a table with the distribution of the microfossils in the profile are presented. Some affinities between the Maastrichtian charophytes -including some non-rnarine ostracods-and from Yacoraite and other allied South American florules are discussed