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Ardipithecus kadabbaLate Miocene Evidence from the Middle Awash, Ethiopia$
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Yohannes Haile-Selassie

Print publication date: 2009

Print ISBN-13: 9780520254404

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520254404.001.0001

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Volcanic Record of the Adu-Asa Formation

Volcanic Record of the Adu-Asa Formation

(p.62) (p.63) 3 Volcanic Record of the Adu-Asa Formation
Ardipithecus kadabba

William K. Hart

Giday Woldegabriel

Yohannes Haile-Selassie

Paul R. Renne

University of California Press

This chapter examines the Mio-Pliocene volcanic materials exposed along the western margin of the Middle Awash area, with a primary focus on the late Miocene deposits of the Adu-Asa Formation. The primary goals of this chapter are to: define the different types of volcanic material preserved in the Adu-Asa Formation; present a working composite stratigraphic view of the Adu-Asa Formation volcanic horizons; present the existing geochemical data for western margin volcanic samples, including some with uncertain chronostratigraphic context; illustrate the data and observations that provided the basis for previous correlations and naming of key volcanic marker horizons; and illustrate the data and observations that provide new regional correlations and hence the establishment of newly named volcanic horizons.

Keywords:   Mio-Pliocene, volcanic materials, Middle Awash, Adu-Asa Formation, volcanic samples, volcanic horizons

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