Fig. 10
From: The use of mineral interfaces in sand-sized volcanic rock fragments to infer mechanical durability
Relationship between grain size and composition of the sand fraction in Aeolian beaches sand. a, b: Very coarse sand (2.00–1.00 mm; 5x) with only predominant polymineralic volcanic lithic fragments. a Crossed nicols, b Plane-polarized light. c, d: Coarse sand (1.00–0.50 mm) with predominant polymineralic volcanic lithic fragments and few monocrystalline grains (1.00–0.500 mm; 5x). c Crossed nicols, d Plane-polarized light. e, f: Medium sand (0.500–0.250 mm) with predominant monocrystalline grains and minor polymineralic lithic volcanic grains; (5x). e Crossed nicols, f Plane-polarized light