The Early Dynastic-Akkadian transition, Part 1. When did the Akkadian period begin?

We may want to recognise an “Akkadian period” in archaeology for two reasons. A sequence of periods is used as a system of chronological reference, and the Akkadian period conventionally represents the time from 2334–2154 BC (Walker 1995, 234). Periods are also used to define fields of analysis in which studies of social structure or other synchronic investigations may be conducted. The Akkadian period is known as the “first empire” which saw major political and administrative innovations. In archaeology periods have to be defined from the changes in artefact types, so a concordance is needed between the historical and artefactual phases. During the last thirty years McG. Gibson has persistently addressed questions of chronology, and has made an especially important contribution to the chronology of the Akkadian period. A new article (Gibson and McMahon 1995) represents the present state of this issue, based on excavations in the Diyala and Hamrin regions, and in the vicinity of Nippur. Dr McMahon has subjected thousands of sherds from stratified occupation surfaces to statistical analysis, and publication of their distribution and comparanda is expected. The resulting pottery sequence, exhaustively constructed, and summarised in that article, will constitute the principal reference sequence for archaeological sites of this period in southern Iraq. In this article, while accepting the validity and importance of this achievement, I will examine how the Akkadian period should be defined and how pottery sequences should be calibrated with respect to historical periods. I will suggest that the Akkadian pottery should be calibrated by ultimate reference to the glyptic sequence, and that this results in a different dating for the strata in question.