Fig. 1. Thin section micrograph from soil in Column 9. Multipoint chemical analysis using energy dispersive x-ray analysis (EDXA) is marked with arrows, chemical results are as follows(the percentages are noted SiO₂, Al₂O₃, CaO, K₂O, and FeO, respectively): No. 1., 56.02, 10.16, 9.43, 3.51, 20.30; No. 2., 60.70, 24.23, 2.85, 7.84, 4.19; No. 3., 60.20, 15.57, 2.03, 7.57, 14.01; and No 4., 96.62, 1.34, 0.78, 0.77, 1.19.

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