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The hipparions of the Baringo Basin sequence

Nature volume 254, pages 211–212 (1975)Cite this article

Abstract

THE first appearance of Hipparion in land mammal populations of the northern hemisphere is one of the best documented biochronological events of the Neogene: the genus appeared first in the Mediterranean world about 12.5 Myr ago1. In France2 its first appearance was during the Middle–Upper ‘Helvetian’ (ante-‘Tortonian’). New radiometric information from the Far East supports an age of 10.5 Myr for the base stratotype Tortonian1. This means that the Hipparion datum of 12.5 Myr is some 2 Myr earlier than the advent of the Vallesian.

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  1. Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands

    DICK A. HOOIJER

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  1. DICK A. HOOIJER
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HOOIJER, D. The hipparions of the Baringo Basin sequence. Nature 254, 211–212 (1975). https://doi.org/10.1038/254211a0

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