lower carboniferous to lower triassic
常見例句
- According to the plant fossil and sporopollen analysis , it should be Upper Carboniferous or Lower Triassic, it offers factual data for the bound of coal-bearing stratum in North China.
經(jīng)採(cǎi)集植物化石和孢粉樣進(jìn)行鋻定、分析 ，初步確定該含煤地層時(shí)代爲(wèi)晚古生代晚石炭世～早二曡世沉積 ，爲(wèi)華北晚古生代含煤地層沉積邊界的厘定提供了可靠依據(jù)。 返回 lower carboniferous to lower triassic