辽东半岛南部寒武系下统碱厂组古杯化石

ARCHAEOCYATHID FOSSILS FROM THE LOWER CAMBRIAN JIANCHANG FORMATION OF THE SOUTHERN LIAODONG PENINSULA

文中记述了大连金州葫芦套含三叶虫Megapalaeolenus fengyangensis的碱厂组内源碎屑岩,所含的古杯化石Archaeocyathus tianhebanensis,A.hupehensis,Protopharetra qidingshanensis,P.sp.1,P.sp.2,Sanxiacyathus sinuatus等。属天河板古杯组合(Tianheban Archaeocyathid Assemblage);为早寒武世中期。古杯化石与三叶虫碎片、藻类化石碎片堆积成礁相。这一发现填补了华北地层区早寒武世生物种类的空白,对研究早寒武世沉积岩相古地理提供了资料、为寻找石油天然气提供了新的信息。

Archaeocyathid fossils were found for the first time from the Lower Cambrian Jianchang Formation in Hulutao, Qidingshan, Jinzhou, Liaoning. Archaeocyathids described in this paper include 3 genera and 6 species, comprising 2 new species and 2 sp. indet., namely, Archavocyathus hupehensis, A. tianhebanensis, Protopharetra qidingshanensis sp. nov., P. sp. 1, P. sp. 2, and Sanxiacyathus sinuatus sp. nov. This archaeocyathid assemblage corresponds to the Tianheban archaeocyathid assemblage, i. e. corresponds to the Megapalaeolenus zone of the Late Tsanglangpu stage. Fragments of archaeocyathids, trilobites and algae form hioreefs. The discovery furnishes new evidence for looking for oil and natural gas and studying lithofacies and paleogeography.