Cone-shaped rock bed - Ensuikeigansho

Japanese: 円錐形岩床 - えんすいけいがんしょう
Cone-shaped rock bed - Ensuikeigansho

...cones are made up of two or more different rock types, but the boundary between them is gradual. (2)cone sheet A cone-shaped sheet formed when pressure in a magma chamber increases, causing cone-shaped cracks in the surrounding rocks into which magma penetrates. Several layers of sheets emerge from the same center, with the outer ones sloping more gently than the inner ones.

*Some of the terminology that refers to "conical bedrock" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…二つ以上の異なる岩型の部分からなるが,その境は漸移している。(2)円錐形岩床cone sheet マグマだまりのなかの圧力が増加し,そのため周囲の岩石に円錐形の割れ目群が生じ,そこにマグマが貫入したもので,上方に向かって開いた円錐形の形をした岩床。同一の中心から幾重にも重なって岩床が出ており,外側のものは内側のものよりもゆるく傾斜している。…

※「円錐形岩床」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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