Oman corals suggest that a stronger winter shamal season caused the Akkadian Empire (Mesopotamia) collapse Watanabe, Takaaki K. ; Watanabe, Tsuyoshi ; Yamazaki, Atsuko ; Pfeiffer, Miriam Abstract Publication: Geology Pub Date: December 2019 DOI: 10.1130/G46604.1 Bibcode: 2019Geo....47.1141W