Geosite List Home Geosite Coal Seam in Taniguchi Coal Seam in Taniguchi You can find a 20cm layer of coal that has a metallic glow sandwiched in the Kumano strata. There used to be seven coal mines in this area, and Taniguchi outcrop is an extension of one of them. Map Coal Seam in Taniguchi 33.7838724,135.841244,14 See in the map app