京都では白石砂がいたるところにある/枯山水/鴨川は片方が黒、片方が白？/ 白川からの砂利砂/比叡山と大文字山の間に花崗岩域/北白川花崗岩地帯/約９８００万年前/花崗岩のまわりにホルンフェルス帯/ブランド砂の白川砂/平安から江戸にかけて重宝/昭和に採取禁止に/風化しやすいので代替石が必要/白川砂は柔らかい透明な白さ/岡山の北木石が似ている/清少納言の有名な一節/将来はV字谷？ 京大医生研：鴨川の白い砂の謎 https://youtu.be/yLR4dsB7vl0?si=PwAJh8SPJ4mvTXCa 白川砂の研究論文 https://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/232337/2/dnogk02262.pdf 銀閣寺の白砂の謎 https://chikusai5.exblog.jp/32959667/#:~:text=
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