Yellow Earth Boy - Odokozo

Japanese: 黄土小僧 - おうどこぞう
Yellow Earth Boy - Odokozo

...The chemical composition of the part excluding carbonates is SiO 2 72-82%, Al 2 O 3 6-10%, Fe 2 O 3 1-6%, CaO 0.8-1%, Na 2 O 0-1%, K 2 O 1-2%, P 2 O 5 0.1-0.4%. In loess strata, carbonates that once dissolved are reprecipitated in the gaps, resulting in numerous rows of grayish-white tubercles. These are called loess dolls or loess boys because of their doll-like shape. Loess is rich in fine gaps (porosity 40-50%) because the mineral particles that make it up are angular, and therefore highly permeable, so stagnant water layers rarely form, and therefore well water is difficult to obtain in loess areas. ...

*Some of the terminology that refers to "Yellow Earth Monk" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…炭酸塩を除いた部分の化学組成は,SiO272~82%,Al2O36~10%,Fe2O31~6%,CaO0.8~1%,Na2O0~1%,K2O1~2%,P2O50.1~0.4%である。 レスの地層には,いったん溶解した炭酸塩が間隙(かんげき)内に二次的に再沈殿して生じた灰白色の結核が多数並んでいる場合があり,その形が人形に似ているため黄土人形とか黄土小僧などと呼ばれている。レスは,それを構成する鉱物粒子が角ばっているため,微細な間隙に富み(間隙率40~50%),そのため透水性がきわめてよいので停滞水層はほとんど形成されず,したがってレス地帯では井戸水が得にくい。…

※「黄土小僧」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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