crest

Japanese: crest
crest

…For the analysis of fold structures, the fold axis and axial plane are the most basic geometric elements, but for the aforementioned oil exploration, since oil is lighter than water and tends to accumulate in the highest parts, related terms are also used. That is, the highest point on the same fold surface based on a horizontal plane is called the crest, and the lowest point is called the base. In the same way as hinges, the crown line, crown surface, base line, and base surface are defined. …

*Some of the terminology that mentions "crest" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…褶曲構造の解析にとって,褶曲軸や軸面は最も基本的な幾何学的要素であるが,前述の石油探鉱にとっては,石油は水より軽いのでいちばん高い部分にたまりやすいことから,これに関連した術語も使われている。すなわち,水平面を基準として同一褶曲面上でいちばん高い位置にある点を冠(クレストcrest)といい,反対にいちばん低い点を底という。ヒンジと同様にして,冠線,冠面や底線,底面が定義される。…

※「crest」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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>>:  Crespi, GB (English)

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