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. 2023 Sep 5;6(1):27. doi: 10.1007/s41982-023-00154-y

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© The Author(s) 2023

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Fig. 10 — Production schemes of Notarchirico. Raw material selection: selection of nodules with rectangular (1), round (2), or cubic (3) morphologies. Operative schemes: A exploitation of one large knapping surface through a peripherical striking platform producing either orthogonal or centripetal negatives; B unipolar exploitation, eventually leading to semitournant behaviour using the natural convexities (edges and arises) of the nodules; C SSDA (systeme par surface de débitage alterné) exploitation of the cores, frequent rotation and inversion of the striking platforms and knapping surfaces. Production: typical obtained products: orthogonal flake (a), centripetal flake (b), unipolar débordant flake (c), unipolar flake (d), débordant flake without removals (e). Retouch of flakes and nodules: researched morphologies: peripheral convex retouch (f), lateral rectilinear retouch (g), notch (h), convergent/pointed retouch (i)