...Even today, it is mined in various places, mainly as a cement raw material. What has long been called rice stone (rice grain stone) in Kuzu, Tochigi Prefecture, is a free individual of Parafusulina . What is called pine needle stone in Kesennuma, Miyagi Prefecture, is the long, thin shell of Monodiexodina that has dissolved and remained in the sandstone. *Some of the terminology that mentions "Parafusulina" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…現在も各地で主としてセメント原料として採掘されている。栃木県葛生で古くから米石(米粒石)といわれるものはパラフズリナParafusulinaの遊離個体である。宮城県気仙沼で松葉石とよばれるものは,モノディークソーディナMonodiexodinaの殻がとけて砂岩中に残った細長い外形である。… ※「Parafusulina」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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