The paper presents the findings of a revision of a flint assemblage subjected to aeolian corrasion from Sosnovyi Bor horizon VI, southern Angara, in the Angara-Belaya geoarchaeological region. Initially, the industry was attributed to the “Makarovo Paleolithic Horizon” and dated to the pre-Karga/pre-Murukta stage in accordance with the idea of extreme deflation periods in Siberia. Our revision has resulted in a more accurate assessment of the assemblage composition, correcting the views of the toolkit, flaking strategies, and aeolian corrasion of lithics. We challenge the earlier idea that narrow-faced cores were made on bifaces. Instead, the findings indicate the use of volumetric prismatic and flat-parallel cores with a maximal reduction of residual forms. Two types of blanks are described: blades and bladelets. Small tools include burins, implements with a fashioned tip (“nose” or “spur”), retouched blades (the retouch sometimes extends to proximal parts). Signs of aeolian corrasion range from weak luster to completely worn-off facets and pitted surfaces. Chronological and cultural proximity of Sosnovyi Bor to Makarovo IV industries is questioned despite similarities in post-deposition conditions and flaking, because the tool kits are markedly different. The closest parallels are found among Early Sartan small-blade industries of Trans-Baikal and Yeniseian Siberia. Abrasion could have occurred during the cold and arid maximum of the last glaciation. We conclude that the industry dates to the middle stage of the Upper Paleolithic.