Since 2012, the French Mission in Oman has discovered several Palaeolithic sites in the south-eastern foothills of the Sufrat Dishshah (a hill of the Sufrat Valley/Wādī al-Сufrāt), in the Adam region of north-central Oman. These sites are attributed to the Lower through to the Late Palaeolithic (Bonilauri et al. Reference Bonilauri, Beuzen-Waller, Giraud, Lemée, Gernez and Fouache2015). The 2016 field season was dedicated to further investigation of the previously identified sites of the Sufrat Dishshah area. A number of additional artefacts were located and studied on site; four artefacts—two bifaces and two Nubian cores—were retained for further study. These finds have particular importance for the understanding of Middle Palaeolithic variability and cultural diffusion in Oman, and they represent one of the most significant results of the 2016 Adam expedition.

The Nubian Complex, a subcategory of the Levallois technocomplex, was first identified in northern Sudan in the 1960s (Guichard & Guichard Reference Guichard, Guichard and Wendorf1965). To date, additional sites using this technology have been discovered in North Africa—the middle and lower Nile Valley—and also East Africa (Van Peer Reference Van Peer and Vermeersch2000; Van Peer et al. Reference Van Peer, Vermeersch and Paulissen2010). Outside of the African continent, Nubian technology has been identified across southern Arabia, including central Yemen (Inizan & Ortlieb Reference Inizan and Ortlieb1987; Crassard Reference Crassard, Petraglia and Rose2009) and southern Oman (Rose et al. Reference Rose, Usik, Marks, Hilbert, Galletti, Parton, Geiling, Cerný, Morley and Roberts2011; Usik et al. Reference Usik, Rose, Hilbert, Van Peer and Marks2012), and in northern Saudi Arabia at the Al-Jawf sites (Hilbert et al. in press). The Nubian Complex emerged chronologically in early MIS 5 (Vermeersch Reference Vermeersch and Garcea2010). In southern Oman, the site at Aybut Al Auwal places the Arabian Nubian Complex at 106 000 years ago (Rose et al. Reference Rose, Usik, Marks, Hilbert, Galletti, Parton, Geiling, Cerný, Morley and Roberts2011) (Figure 1).

Figure 1. Map of Nubian Complex occurrences in north-eastern Africa and Arabia.

The Nubian Complex is generally divided into types one and two. In the former, management of the medial distal guiding ridge on the flaking face is usually achieved by removing two distal-divergent débordant flakes to form the pointed distal end through the negative of the bulb of percussion. In most cases, a convergent final product was removed from the opposed striking platform at the proximal end. Both of the cores collected from the Sufrat site—Adam region (Figure 2)—show this specific bidirectional flaking pattern with lateral preparation. As such, the cores can be attributed to the Nubian type one.

Figure 2. Map of the study region in Ad Dakhiliyah Governorate.

Our preliminary studies indicate that the Nubian Complex, although present, illustrates a minority of the artefact-production methods in use at the Sufrat sites. It should be noted that other Levallois-production methods, such as preferential and recurrent cores, were identified during earlier prospection at Sufrat (Bonilauri et al. Reference Bonilauri, Beuzen-Waller, Giraud, Lemée, Gernez and Fouache2015).

The Sufrat Nubian cores are smaller and differ in appearance from the classic forms reported from the Dhofar Nubian Complex (Figure 3), although, among the Nubian sites in the Dhofar region, the cores from locality TH.69 are smaller than from other typical Nubian sites (Usik et al. Reference Usik, Rose, Hilbert, Van Peer and Marks2012). Given their size and technological characteristics, the Sufrat Nubian cores are most similar in terms of reduction strategy and method to the Late Dhofar Nubian complex of the Mudayy area, but it is uncertain whether the Sufrat material represents a local industry derived from classic Nubian Levallois technology (Figure 4).

Figure 3. Nubian type one core from Sufrat Dishsha.

Figure 4. Nubian artefacts from Sufrat Dishsha.

Prior to our reassessment of the Sufrat site and the discovery of these cores, it was believed that the Nubian Complex did not extend farther east than the Dhofar region in southern Oman; hence, this is the first evidence of Nubian technology in the north of the country. In turn, this discovery will help to refine our understanding of the Middle Palaeolithic chronology and variability of Oman. We hope to continue our research in this region with further prospection.