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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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New Data on Miocene Biostratigraphy and Paleoclimatology of Olkhon Island (Lake Baikal, Siberia)

New Data on Miocene Biostratigraphy and Paleoclimatology of Olkhon Island (Lake Baikal, Siberia)

(p.508) Chapter 22 New Data on Miocene Biostratigraphy and Paleoclimatology of Olkhon Island (Lake Baikal, Siberia)
Fossil Mammals of Asia

Gudrun Daxner-Höck

Madelaine Böhme

Annette Kossler

Columbia University Press

This chapter presents new data on the Miocene biostratigraphy and paleoclimatology of Olkhon Island (Lake Baikal, Siberia). Lake Baikal, located in the East Siberian Baikal Rift System, is the deepest, most voluminous, and oldest freshwater body on Earth. From the northwestern part of Olkhon Island, two localities are known to have yielded terrestrial fossils of the Neogene, both of which belong to the Khalagay Formation: the Tagay section and the Saray section. The vertebrate assemblages from the Tagay and Saray I sections show remarkable affinities to assemblages from western Eurasia, especially from Central Europe. Ectothermic vertebrates from these two sections also resemble assemblages from western Kazakhstan. These results are in agreement with earlier findings that a largely homogeneous vertebrate fauna (at least at the genus level) may have existed in the middle latitudes of Eurasia during the Middle Miocene and perhaps during parts of the Late Miocene. Paleoclimatic analysis suggests that repeated strong fluctuations in humidity affected the Baikal Lake area during both the Middle and Late Miocene.

Keywords:   biostratigraphy, paleoclimatology, Olkhon Island, Lake Baikal, Siberia, fossils, Khalagay Formation, vertebrates, fauna, Miocene

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