论文部分内容阅读
通过对阳原盆地中井儿洼孔(深200.6m)河湖相岩石地层、生物地层和古地磁等的研究,将第四系河湖相层新命名为阳原群,进一步划分为3个组,即下更新统泥河湾组(深200.6～107.8 m,未见底),由褐灰色粉砂质粘土和粉砂组成;下一中更新统小渡口组(深107.8～20.6m)由灰、灰黑色粉砂质粘土和粉砂组成,内含12段纹层,可作为标志层,底界年龄约1000ka;中一上更新统井儿洼组(深20.6～0m),是本文新命名的组,由黄绿色粉砂和粉砂质粘土组成,底界年龄约200ha。顶部年龄推测为10ka左右。本孔地层划分有助于阳原盆地及毗邻地区区域对比,也为全球变化提供了基础材料。
By studying the lithosphere, biostratigraphy and paleomagnetism of the Zhongjingya depression (depth 200.6m) in the Yangyuan basin, the quaternary river and lake layers were newly named as Yangyuan group and further divided into three groups , That is, the Lower Pleistocene Nihewan Formation (depth 200.6 ~ 107.8 m, bottomless), composed of brownish gray silty clay and silt. The Xiaoxukou Formation (depth 107.8 ~ 20.6m) , Silty black silty clay and silt composed of 12 segments of rhyolite, which can be used as a marker layer, the bottom boundary of about 1000ka; in the middle of a renewal of the system Jing Erwa (depth 20.6 ~ 0m), is the new name of this article Of the group, composed of yellow-green silt and silty clay, the bottom boundary of about 200ha. The top age is assumed to be around 10ka. The stratigraphic division of this site contributes to the comparison of the Yangyuan basin and the adjacent areas and provides the basic material for global change.