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.
雙語例句
1. These provide base for the correct measurement and valuing of graptolite reflectivity.
從而為筆石反射率的正確測定和取值奠定了基礎(chǔ).
來自互聯(lián)網(wǎng)
2. The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.