marker bed

Japanese: marker bed(英語表記)markerbed
marker bed

...Key layers are also important as structural reference surfaces when creating isopach diagrams. The above definition was originally used as the term marker bed, but the term key layer later became more widely used in Japan as a synonym. However, in seismic stratigraphy using reflection surveys, a prominent reflective surface that can be traced over a wide area is called a marker bed.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また鍵層は等層厚線図を作る時の構造的基準面としても重要である。前述のような定義は,本来マーカーベッドmarker bedという言葉で使われてきたが,後に同義語として鍵層のほうが日本では普及した。ただし,反射法地震探査による音響層序学においては,広域に追跡できる顕著な反射面をマーカーベッドと呼んでいる。…

※「marker bed」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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