华北地层大区东南区寒武纪早期地层对比与统一划分

THE CORRELATION AND UNIVERSAL DIVISION OF THE EARLYCAMBRIAN STRATA AT THE SOUTHEAST SUBPROVINCE OF THE NORTHCHINA STRATIGRAPHIC PROVINCE

华北地层大区东南区的寒武纪早期地层 ,宜统一划分为6个三叶虫化石带(Shantungaspis,Yaojiayuella ,Qiaotouaspis,Redlichia(Pteroredlichia) ,Megapalaeolenus和Hsuaspis)和3个组(毛庄组、馒头组和猴家山组)。毛庄组包含Shantungaspis带 ,Yaojiayuella带和Qiaotouaspis带一部分 ,馒头组包含Qiaotouaspis带大部分、Redlichia(Pteroredlichia)带和Megapaeolenus带 ,猴家山组仅含Hsuapis带。前2带属毛庄阶 ,第3、4带属龙王庙阶 ,后2带属沧浪铺阶。中、下寒武统界线划在毛庄阶与龙王庙阶即Yaojiayuella带与Qiaotouaspis带之间。毛庄组属下—中寒武统 ,其它2组属下寒武统。按各组的岩层组合特征 。

The early Cambrian strata at the southeast subprovince of the North China Stratigraphic Province is suitable for being universally classified into 6 trilobite zones (Shantungaspis, Yaojiayuella, Qiaotouaspis, Redlichia(Pteroredlichia),Megapalaeolenus and Hsuaspis),3 Formations(Maozhuang,Mantou and Houjiashan) and 15 members The Maozhuang Stage yields the first and second zone,the Longwangmiao Stage the third and fourth zone,and the Canglangpu Stage the last two zones The lower-middle Cambrian boundary should be put between the Maozhuang Stage and the Longwangmiao Stage,i e between the Yaojiayuella zone and the Qiaotouaspis zone The Maozhuang Formation belongs to lower-middle Cambrian Series and the other two Formations to the lower Cambiran