论文部分内容阅读
山西阶是笔者建立的华北地层区晚古生代的地方性(区域性)阶之一,兹选太原西山山西组(岩石地层单位)层型剖面为山西阶之层型,并选晋东南晋城—陵川地区自黄水沟砂岩(与太原西山北岔沟砂岩层位相当)之底至佳样砂岩(与太原西山骆驼脖子砂岩层位相当)之底的一段地层为山西阶的次层型。在山西东南部,山西
The Shanxi step is one of the local (regional) stages of the Late Paleozoic in the North China stratum established by the author. The stratigraphic section of the Shanxi Formation (lithostratigraphic unit) in the Taiyuan Xishan Mountain is of the strata type of Shanxi and the Jincheng-Jincheng-Ling The bottom of the Yellowstone ditch (equivalent to the Beicha Dagou sandstone in the Taiyuan Xishan) in the Sichuan area is the sub-layer of the Shanxi order. Southeast of Shanxi, Shanxi