Economic and Environmental Geology

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Fig. 11.

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Fig. 11. Microphotographs and spots showing the SEM-EDS analysis for the surface contaminants on foundation stones in the Sebyeonggwan Hall. (A, B) Samples with brown discoloration through the external surface area of dacitic lapilli tuff. (C) Samples of black discoloration. (D) Samples of foreign substances of the Gomagi. (E) Samples with white discoloration in the internal surface area of dacitic lapilli tuff. (F) Samples of repairing materials.
Econ. Environ. Geol. 2021;54:199-212 https://doi.org/10.9719/EEG.2021.54.2.199
© 2021 Econ. Environ. Geol.