2003 Seattle Annual Meeting (November 25, 2003)
Paper No. 85-12
Presentation Time: 8:00 AM-12:00 PM

STRATIGRAPHY OF THE MIOCENE/PLIOCENE PISCO FORMATION IN THE PISCO BASIN, PERU

BRAND, Leonard R., Loma Linda Univ, Dept Natural Sciences, Loma Linda, CA 92350, lbrand@ns.llu.edu, URBINA, Mario, Departamento de Paleontologia de Vertebrados, Museo de Historia Nat UNMSM, Arenales 1256 - Jesus Maria, Lima 14, Peru, CARVAJAL, Cristian R., Geology and Geophysics Department, Univ of Wyoming, Laramie, WY 82071, and DEVRIES, Thomas J., Burke Museum of Natural History and Culture, Univ of Washington, Seattle, WA 98195

The vertebrate fossils and the geology of the Miocene/Pliocene Pisco Formation have been the subject of investigation for several decades. Paleontology work has focused on systematics and evolution, with recent investigation of the taphonomy of the abundant whales. The Pisco Formation and associated formations have been interpreted as a series of transgression/regression cycles in shallow bays. Geologic sections have been measured at various places, but there has been no published stratigraphy for the formation as a whole. We have measured a complete section through the Pisco Formation on the west side of the Ica River, from the vicinity of Yesera de Amara to Cerro Blanco and Cerro Ballena. Correlation between prominent outcrops and lateral correlation from the measured section was done by walking out marker beds. Tentative correlation was also made to the west, across the modern dune field to Dos Quesos and Cerro Queso Grande. The Pisco Formation in the Pisco Basin is about 640 m thick, and shows pronounced facies changes with a nearshore-offshore trend over a few km. This area in the Pisco Formation, with its fairly continuous outcrop and abundant marine vertebrate fauna, has considerable potential for study of faunal changes from Middle Miocene into Pliocene.

2003 Seattle Annual Meeting (November 25, 2003)
Session No. 85--Booth# 100
Paleontology/Paleobotany (Posters) I
Washington State Convention and Trade Center: Hall 4-F
8:00 AM-12:00 PM, Monday, November 3, 2003

Geological Society of America Abstracts with Programs, Vol. 35, No. 6, September 2003, p. 160

© Copyright 2003 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.