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Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

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

Fig. 4

Frequency of each microtexture on the quartz grain surfaces of each sample (n = 20): a area I and b areas II–V. The microtextures are defined as follows. 1 Crystal overgrowth; 2 silica precipitation; 3 oriented etch pits; 4 solution pits; 5 small holes; 6 large holes; 7 upturned plates; 8 flat cleavage face; 9 V-shaped percussion cracks; 10 crescentic percussion marks; 11 small conchoidal fracture (< 10 μm); 12 medium conchoidal fracture (10–100 μm); 13 large conchoidal fracture (> 100 μm); 14 arcuate steps; 15 straight steps

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