Abstract 40Ar/39Ar dating has been applied extensively to volcanic units of late Miocene to Pleistocene age in the Middle Awash study area, and is the most important dating method applied to these deposits. This chapter discusses all available 40Ar/39Ar data for the Adu-Asa Formation, including some data not previously reported, plus some previously unpublished results from the nearby Central Awash Complex (CAC). The methods and facilities employed for 40Ar/39Ar dating is divided into two different approaches: incremental heating and single-crystal total fusion.
Jay Quade, Naomi E. Levin, Scott W. Simpson, Robert F. Butler, William C. McIntosh, Sileshi Semaw, Lynnette Kleinsasser, Guillaume Dupont‐Nivet, Paul Randall Renne, Nelia Dunbar
Allen Schaen, Brian R. Jicha, K. V. Hodges, Pieter Vermeesch, Mark E. Stelten, C. M. Mercer, David Phillips, Tiffany Rivera, Fred Jourdan, Erin Matchan, Sidney R. Hemming, Leah E. Morgan, S. P. Kelley, William S. Cassata, M. T. Heizler, Paulo Vasconcelos, Jeffrey A. Benowitz, Anthony Koppers, Darren F. Mark, Elizabeth Niespolo, Courtney J. Sprain, Willis E. Hames, Klaudia F. Kuiper, B. D. Turrin, Paul Randall Renne,
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