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Biostratigraphy and Vertebrate Paleontology of the San Timoteo Badlands, Southern California$
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L. Barry Albright

Print publication date: 2000

Print ISBN-13: 9780520098367

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098367.001.0001

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Comparison of the San Timoteo Badlands, Anza-Borrego Desert, and Arizona Faunal Successions

Comparison of the San Timoteo Badlands, Anza-Borrego Desert, and Arizona Faunal Successions

Chapter:
(p.22) (p.23) Comparison of the San Timoteo Badlands, Anza-Borrego Desert, and Arizona Faunal Successions
Source:
Biostratigraphy and Vertebrate Paleontology of the San Timoteo Badlands, Southern California
Author(s):

L. Barry Albright, III

Publisher:
University of California Press
DOI:10.1525/california/9780520098367.003.0004

This chapter discusses temporal ranges of sixteen important taxa chronologically from faunas of comparable age in southern California and Arizona. The LSD for each taxon in each region is plotted to test the regional synchroneity of these faunal events. The LSD of Thomomys in the San Timoteo sequence is significantly earlier than in the Anza-Borrego or Arizona sequences. Thomomys first appears in the Badlands at about 3.8 Ma but not until about 2.4 Ma in the Vallecito Creek LF of the Anza-Borrego sequence. Geomys, in contrast, which has not been found in the San Timoteo Badland, first occurs in the Anza-Borrego sequence in the Arroyo Seco assemblage at about 3.5 Ma.

Keywords:   taxa, Thomomys, Geomys, Ma, Seco

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