Radiolarite

Japanese: radiolarite
Radiolarite

...Species such as the Japanese hominin Acanthometron pellucidum (illustration) and the Japanese hominin Amphilonche belonoides are easily obtained using plankton nets throughout Japan, and are widely distributed. Radiolarian fossils are often found in fine-grained marine sedimentary rocks such as mudstone, but hard siliceous rocks in which these fossils are concentrated are called radiolarite. Some of the siliceous sedimentary rocks commonly known as cherts fall into this category. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…アサヒムシAcanthometron pellucidum(イラスト)やヤリアサヒムシAmphilonche belonoidesなどは日本各地でプランクトンネットにより容易に得られ,分布も広い。 放散虫の化石は泥岩のような細粒の海成堆積岩中に含まれることが多いが,とくにこの化石が密集しているケイ質の硬い岩石は放散虫岩radiolariteと呼ばれる。一般にチャートといわれるケイ質堆積岩の一部はこれに当たる。…

※「radiolarite」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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