Fake sand - Gisa

Japanese: 偽砂 - ぎさ
Fake sand - Gisa

…These soils are rich in partially dehydrated hydrous iron oxides, yellow or light yellow-brown in color. The iron oxides form small tubercles or hardened aggregates called pseudo sands. They react slightly acidic because they are saturated with base. …

*Some of the terminology that refers to "fake sand" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この土壌は部分的に脱水された水和酸化鉄に富み,黄色または明黄褐色を呈する。酸化鉄は偽砂pseudo sandとよばれる小さな結核または硬化した集合体を形成している。塩基で飽和されているため反応は微酸性を示す。…

※「偽砂」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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