Fossil bed

Japanese: 化石床 - かせきしょう
Fossil bed

...A dense layer that has a considerable degree of horizontal continuity is called a fossil layer in the narrow sense. In contrast, a fossil-rich part in a stratum that is intermittently arranged horizontally, sandwiched between non-fossil parts, is called a fossil bed. In the case of a fossil bed, it shares a common bedding plane with the surrounding fossil-free parts, and the origin of this is considered important, as it shows that the two were formed at the same time.

*Some of the terminology that refers to "fossil beds" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…密集して層をなし水平方向にかなり連続性をもつものを狭義の化石層という。これに対して,地層内で化石を多産する部分が含まない部分をはさみ断続的に横に並ぶのは化石床(かせきしよう)と呼ばれる。化石床の場合は,周囲の無化石の部分と共通の層理面をもっていて,両者が同時的に形成されたことを示すというその成因が重視されている。…

※「化石床」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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