Paper No. 11
Presentation Time: 9:00 AM-6:30 PM


ADELSBERGER, Katherine A.1, HILL, Danika N.1, SMITH, Jennifer R.2 and GARCEA, Elena A.A.3, (1)Environmental Studies, Knox College, 2 East South St, Galesburg, IL 61401, (2)Earth & Planetary Sciences, Washington University, 1 Brookings Dr, Campus Box 1169, St Louis, MO 63130, (3)Dipartimento di Lettere e Filosofia, Università di Cassino, Via Zamosch 43, Cassino, FR, 03043, Italy,

The sedimentologic context of ceramic-bearing site 8-B-76, on the west side of alluvial Sai Island in northern Sudan, reveals localized depositional shifts due to Nile River migration between early and mid-Holocene occupations, at the transition from a foraging (Khartoum Variant ‘Mesolithic’) to a herding (Abkan ‘Neolithic’) occupation. Channel deposits give way to stable river-margin environments and overbank deposition during the early Holocene Khartoum Variant (KV). These deposits were then incised and replaced by channel bar deposits also containing KV ceramics, which may represent a second KV occupation. A later period of channel migration away from the western margin of Sai Island led to silty overbank deposition with no archaeological materials despite a more stable landscape, suggesting an occupational hiatus on this part of the island. The lack of evidence for a human presence in this otherwise well-utilized area may be attributable to higher flood volumes and therefore less habitable floodplain environments during the mid-Holocene African Humid Period. The uppermost unit in the area preserves mid-Holocene Abkan ceramics within accretionary aeolian sediments, indicating more arid conditions and an absence of late-Holocene deposition or reworking along the western margin of Sai Island.