El Jurásico de la Argentina y sus amonites

RICCARDI, A.C.

Revista de la Asociación Geológica Argentina

Asociación Geológica Argentina

Lugar: Buenos Aires; Año: 2008 p. 625 - 643

0004-4822

Amonites have been   fundamental for improving the knowledge of the Argentinean Jurassic. The best and most complete marine Jurassic succession is exposed between 32° and 39° S, along a north — south belt roughly coincident with the boundary with Chile, where all stages, except the Kimmeridgian, are represented by marine facies. Ammonites have provided a biostratigraphic framework to date and correlate lithostratigraphic and sequential units, to reconstruct the history of the marine fill, and to develop other paleontological and geological studies. Recent studies on the systematics and/or biostratigraphy of Andean ammonites have provided the basis to summarize the 45 ammonite zones thus far recognized in the Jurassic of west-central Argentina and to stress their significance for reconstructing  the paleogeographic evolution of the area.