A fossil produced by the accumulation of sediment within the stem of a crinoid, forming a ribbed, cylindrical cast thought to resemble a screw; = s…
单词 | θ5833 |
释义 | the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > containing fossil (4) screw1663 A fossil produced by the accumulation of sediment within the stem of a crinoid, forming a ribbed, cylindrical cast thought to resemble a screw; = s… screw stone1663 a fossil produced by the accumulation of sediment within the stem of a crinoid, forming a ribbed, cylindrical cast thought to resemble a screw… typolite1828 see quot. 1828. boxstone1870 a rounded lump of sandstone or other sedimentary rock containing fossil or mineral fragments in its interior. |
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