lower carboniferous to lower triassic
常见例句
- 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.
经采集植物化石和孢粉样进行鉴定、分析 ，初步确定该含煤地层时代为晚古生代晚石炭世～早二叠世沉积 ，为华北晚古生代含煤地层沉积边界的厘定提供了可靠依据。 返回 lower carboniferous to lower triassic