
Published online:
22 March 2012
Published in print:
30 June 2009
Online ISBN:
9780520942509
Print ISBN:
9780520254404
Contents
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Geological Investigations along the Western Rift Margin of the Transition Zone Geological Investigations along the Western Rift Margin of the Transition Zone
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Stratigraphy of the Adu-Asa Formation Stratigraphy of the Adu-Asa Formation
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Saraitu Member Saraitu Member
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Adu Dora Member Adu Dora Member
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Asa Koma Member Asa Koma Member
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Rawa Member Rawa Member
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Comparison of the Stratigraphic Record of the Transition Zone to Other Rift Margins of the Afar and the Main Ethiopian Rifts Comparison of the Stratigraphic Record of the Transition Zone to Other Rift Margins of the Afar and the Main Ethiopian Rifts
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Migration of Volcanism and Patterns of Faulting within the Transition Zone Migration of Volcanism and Patterns of Faulting within the Transition Zone
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Age and Mechanism of Faulting within the Transition Zone Age and Mechanism of Faulting within the Transition Zone
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Analog for the Origin of the Broad Rift Margins of the Transition Zone Analog for the Origin of the Broad Rift Margins of the Transition Zone
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Physical Paleoenvironmental Records of the Adu-Asa Formation Physical Paleoenvironmental Records of the Adu-Asa Formation
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Conclusions Conclusions
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Chapter
2 Stratigraphy of the Adu-Asa Formation
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Pages
26–61
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Published:June 2009
Cite
Woldegabriel, Giday, and others, 'Stratigraphy of the Adu-Asa Formation', in Yohannes Haile-Selassie (ed.), Ardipithecus kadabba: Late Miocene Evidence from the Middle Awash, Ethiopia (Oakland, CA , 2009; online edn, California Scholarship Online, 22 Mar. 2012), https://doi.org/10.1525/california/9780520254404.003.0002, accessed 8 May 2025.
Abstract
The late Miocene Adu-Asa Formation comprises major sedimentary and volcanic units that crop out along the densely faulted and tilted frontal blocks of the western rift margin of the transition zone between the northern Main Ethiopian Rift (MER) and the southern Afar Rift. This chapter discusses the geological and tectonic processes that led to the origin and evolution of the rift basin of the transition zone. It highlights a decade-long geological and paleontological reconnaissance and focuses investigation along the strike of the frontal fault blocks of the western rift margin of the Middle Awash study area.
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