冀北“清河镇动物群”质疑

DOUBT ABOUT THE "QINGHEZHEN FAUNA" OF NORTHERN HEBEI

摘要: 在冀北新发现的15处含“清河镇动物群”的化石点中,“化石”有的产于长城系常州沟组、串岭沟组和高于庄组内,有的产于前长城纪变质岩系中,在蓟县标准剖面的常州沟组和铁岭组内亦发现有“小壳化石”碎屑。笔者认为,即使它们确是化石,其繁衍的地质时代也绝不仅限于震旦纪至早寒武世。在大多数化石点,“化石”产于角闪岩相变质岩中以及超糜棱岩和变质侵入岩中,这是令人难以理解的。因此,笔者怀疑它们究竟是否真的是化石。

Abstract: Fossils occur in the Changzhaugou, Chuanlinggou and Gaoyuzhuang Formations of the Changcheng System and mstamorphic series at 15 fossil localities with fossils of the "Qinghezhen fauna"discovered recently in northern Hebei, which indicates that the age range of fossils is by no means restricted to the Sinan-Early Cambrian. Besides, fossils occur in amphibolite-facies metamorphic rocks and ultramylonite and metamorphosed intrusive rocks at many fossil localities, which is hard to understand. Therefore, the authors doubt whether they are true fossils.