气候变化领域集成服务门户(CCPortal): The trace fossil Thalassinoides bacae in the Cambrian Zhangxia Formation (Miaolingian Series) of North China

CCPortal

DOI	10.1016/j.palaeo.2019.109333
	The trace fossil Thalassinoides bacae in the Cambrian Zhangxia Formation (Miaolingian Series) of North China
	Wang M.; Li K.; Yang W.; Dai M.; Bai W.; Qi Y.
发表日期	2019
ISSN	0031-0182
卷号	534
英文摘要	Branched, complex burrows with thick linings assigned to Thalassinoides bacae are abundant in the Cambrian Zhangxia Formation (Miaolingian Series) in southern North China. These burrows occur in thinly layered micritic limestones, which were formed in a restricted marine environment surrounded by oolitic shoals. The macromorphological characteristics of the burrows observed in outcrop, combined with microscopic burrow characteristics assessed using light microscopy and scanning electron microscopy, were used to analyze the ethology of T. bacae. The complex geometric characters of horizontal branching tubes and subvertical shafts reflect T.bacae is an agrichnical burrow system. The horizontal tubes were used to cultivate microbes for food, while the subvertical shafts provided openings to the sea floor. Organic material, iron minerals and pyrite framboids just present in the margin of the fill indicate a special micro-environment in the burrow system with a reducing environment and a high organic content, and they may provide evidence for microbial garden. The functions of the thick micrite lining may have included maintenancce of environmental conditions within the burrow and provision of suitable conditions for growing microbes. Dark-colored irregular areas around the lining are identified as diagenetic halos. The burrowers of T.bacae built complex burrows system and thick lining for cultivating microbes to survive in a restricted marine environment that was oxygen-poor and with low food availability, reflecting adaptive behavioral evolution of the metazoan in the middle Cambrian. © 2019 Elsevier B.V.
英文关键词	Agrichnion; Burrow lining; Burrow wall; Carbonate platform; Opportunistic organism; Pyrite framboids
语种	英语
scopus关键词	burrowing organism; Cambrian; carbonate platform; environmental conditions; invertebrate; marine environment; metazoan; morphology; trace fossil; Creediidae; Metazoa; Thalassinoides
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150788
作者单位	School of Resources and Environment, Henan Polytechnic University, Jiaozuo, 454000, China; Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, Henan 454003, China
推荐引用方式 GB/T 7714	Wang M.,Li K.,Yang W.,et al. The trace fossil Thalassinoides bacae in the Cambrian Zhangxia Formation (Miaolingian Series) of North China[J],2019,534.
APA	Wang M.,Li K.,Yang W.,Dai M.,Bai W.,&Qi Y..(2019).The trace fossil Thalassinoides bacae in the Cambrian Zhangxia Formation (Miaolingian Series) of North China.Palaeogeography, Palaeoclimatology, Palaeoecology,534.
MLA	Wang M.,et al."The trace fossil Thalassinoides bacae in the Cambrian Zhangxia Formation (Miaolingian Series) of North China".Palaeogeography, Palaeoclimatology, Palaeoecology 534(2019).