The lack of good flint raw materials in the Polish early Mesolithic has been interpreted thus that the new arriving people were not acquainted yet with the best local sources of flint, proving their external origin. The Ukrainian archaeologist L. Zalizniak (1989, p. 83-84) believes Kunda culture of Central Russia and the Baltic zone, and other so-called "post-Swiderian cultures", derive from the Swiderian culture. Sorokin (2004) rejects the "contact" hypothesis of the formation of Kunda culture and holds it originated from the seasonal migrations of Swiderian people at the turn of Pleistocene and Holocene when human subsistence was based on hunting reindeer. Many of the earliest Mesolithic sites in Finland are post-Swiderian; these include the Ristola site in Lahti and the Saarenoja 2 site in Joutseno with lithics in imported flint, as well as the Sujala site in Utsjoki in the province of Lapland. The raw materials of the lithic assemblage at Sujala originate in the Varanger Peninsula in northern Norway. Concerning this region, the commonly held view today is that the earliest settlement of the North Norwegian coast originated in the Fosna culture of the western and southwestern coast of Norway and ultimately in the final Palaeolithic Ahrensburg culture of northwestern Europe. The combination of a coastal raw material and a lithic technique typical to Late Palaeolithic and very early Mesolithic industries of northern Europe, originally suggested that Sujala was contemporaneous to Phase 1 of the Norwegian Finnmark Mesolithic (Komsa proper), dating to between 9 000 and 10 000 BP. Proposed parallels with the blade technology among the earliest Mesolithic finds in southern Norway would have placed the find closer or even before 10 000 BP. However, a preliminary connection to early North Norwegian settlements is contradicted by the shape of the tanged points and by the blade reduction technology from Sujala. The bifacially shaped tang and ventral retouch on the tip of the arrowpoints and the pressure technique used in blade manufacture are rare or absent in Ahrensburgian contexts, but very characteristic of the so-called Post-Swiderian cultures of northwestern Russia. There, counterparts of the Sujala cores can also be found. The Sujala assemblage is currently considered unquestionably post-Swiderian and is dated by radiocarbon to 9265-8930 BP, the true age being approximately 8300-8200 CalBC.