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Table 1 Observed microtextures and their morphological features. C: chemical features, O: original features, M: mechanical features

From: Analysis of the surface microtextures and morphologies of beach quartz grains in Japan and implications for provenance research

No. Microtexture Morphological feature Type Image (Fig. 3) Reference
1 Crystal overgrowth Thick layers of subhedral to euhedral mineral precipitations C j Pittman 1972; Marzolf 1976
2 Silica precipitation Thin layer or droplets of silica precipitation C k Le Ribault 1977; Higgs 1979
3 Oriented etch pits Regular and oriented depressions C l Amelinckx 1964; Margolis 1968,
4 Solution pits Regular and circular holes C m Higgs 1979
5 Small holes Small remnants of small liquid or gas inclusion O n, o Le Ribault 1977; Higgs 1979
6 Large holes Large remnants of large liquid inclusion O p
7 Upturned plates Jagged outline and irregular in height M q Margolis and Krinsley 1974; Krinsley et al. 1976
8 Flat cleavage face Breakage patterns parallel to the quartz cleavage planes M c, e, r Krinsley and Doornkamp 1973
9 V-shaped percussion cracks Usually triangular shaped depressions with an average depth of 0.1 μm M g, s Higgs 1979
10 Crescentic percussion marks Cone-shaped fractures M t Campbell 1963; Le Ribault 1977
11 Small conchoidal fracture Shell-like breakage patterns (< 10 μm) M u Krinsley and Doornkamp 1973
12 Medium conchoidal fracture Shell-like breakage patterns (10~100 μm) M u Krinsley and Doornkamp 1973
13 Large conchoidal fracture Shell-like breakage patterns (100 μm<) M v Krinsley and Doornkamp 1973
14 Arcuate steps Arcuate and successive step-like features M o, u Cardona et al. 1997
15 Straight steps Straight and successive step-like features M o Cardona et al. 1997