fossilized colonial animal from the Cambrian and later, 1838, from Modern Latin graptolithus, literally "written-stone," from Greek graptos "engraved, written, painted" (verbal adjective of graphein; see -graphy) + lithos "stone" (see litho-). So called because the fossils resemble pens. Related: Graptolitic.
双语例句
1. These provide base for the correct measurement and valuing of graptolite reflectivity.
从而为笔石反射率的正确测定和取值奠定了基础.
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2. The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.
中奥陶世黑色的笔石页岩为典型的半封闭缺氧的深水沉积环境,反映了海水逐步加深,水体也变得相对宁静.
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实用场景例句
These provide base for the correct measurement and valuing of graptolite reflectivity.
从而为笔石反射率的正确测定和取值奠定了基础.
互联网
The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.
