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Fossil Mammals of AsiaNeogene Biostratigraphy and Chronology$
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Mikael Fortelius, Xiaoming Wang, and Lawrence Flynn

Print publication date: 2013

Print ISBN-13: 9780231150125

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231150125.001.0001

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A Single-Point Base Definition of the Xiejian Age as an Exemplar for Refining Chinese Land Mammal Ages

A Single-Point Base Definition of the Xiejian Age as an Exemplar for Refining Chinese Land Mammal Ages

Chapter:
(p.124) Chapter 3 A Single-Point Base Definition of the Xiejian Age as an Exemplar for Refining Chinese Land Mammal Ages
Source:
Fossil Mammals of Asia
Author(s):

Jin Meng

Jie Ye

Wen-Yu Wu

Xi-Jun Ni

Shun-Dong Bi

Publisher:
Columbia University Press
DOI:10.7312/columbia/9780231150125.003.0003

This chapter reviews works surrounding the Chinese land mammal age (CLMA), with particular focus on the stratigraphic data from the Xiejia locality and Junggar Basin. It considers the possibilities that the Xiejia fauna may represent a subunit of the Late Oligocene Tabenbulukian and that a new biochronologic unit, the Suosuoquanian, may be used to replace the Xiejian. Based on the assumption that the Xiejian remains as a valid and improvable land mammal age of China, the chapter proposes a single-point base definition for it, following the general format for defining a Global Stratotype Section and Point. It shows that detailed stratigraphic data are useful for rigorously constructing, defining, and characterizing a land mammal age as indicator of a chronostratigraphic unit in the standard of the International Stratigraphic Guides. A robust CLMA system better reflects the regional evolutionary history of land mammals and provides a well-defined and more accurate biochronology for studies of geohistory in the terrestrial record of the region.

Keywords:   land mammals, Chinese land mammal age, Xiejia, fauna, Suosuoquanian, Xiejian, China, evolution, biochronology, geohistory

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