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QUANTITATIVE ANALYSIS OF TAPHOFACIES AND PALEOCOMMUNITIES IN THE EARLY CAMBRIAN CHENGJIANG LAGERSTATTE
Zhao, Fangchen (赵方臣)1,2; Caron, Jean-Bernard3; Hu, Shixue1,4; Zhu, Maoyan (朱茂炎)1
2009-11-01
Source PublicationPALAIOS
ISSN0883-1351
Volume24Issue:11-12Pages:826-839
Abstract

Detailed sedimentological and quantitative taphonomical analyses of 11,974 fossil specimens from an early Cambrian (Stage 3) Chengjiang-type deposit near Haikou, Yunnan, reveals significant relationships between the original depositional environments and the composition and preservation of their respective fossil assemblages. In general, the Maotianshan Shale is characterized by superimposed couplets of laminated background and thin event mudstone layers representing two distinct taphofacies, A and B, respectively. Fossils in taphofacies A consist predominantly of indeterminate organic elements and fecal or algal strings with few, poorly preserved, soft-bodied animals. Among those, disarticulated arthropods account for 84.3% of specimens (mostly isolated valves of Kunmingella douvillei) and 51.4% of species. Poriferans represent 7.4% of specimens and 22.9% of species. Fossils in this taphofacies have undergone significant pre- or syn-burial decay and represent limited time-averaged assemblages exhibiting low species richness. By contrast, taphofacies B contains greater numbers of species and specimens and better preserved soft-bodied animals. Taphofacies B represents mostly smothered organisms by distal tempestites. Arthropods are also dominant in taphofacies B, both in terms of species richness (41%) and abundance of specimens (44%). Poriferans, priapulids, lobopods, and brachiopods exhibit similar low species richness (6-8% each), but poriferans and lobopods are numerically rare, at around 1% each, whereas priapulids; and brachiopods make up 26% and 24% of specimens, respectively. The arthropod Kunmingella douvillei (19%), the priapulid Cricocosmia jinningensis (19%), and the brachiopod Diandongia pista (18%) are the most abundant species in taphofacies B. Fossil assemblages in taphofacies A and B have similar recurrent and abundant species and similar temporal trends in evenness and richness, but taphofacies A captures only a portion of the species that are preserved in taphofacies B. These results suggest that the fossil assemblages present in both taphofacies represent a single local community subjected to two different taphonomic processes and imply similar recurrent environmental conditions within the section studied.

DOI10.2110/palo.2009.p09-004r
Language英语
WOS KeywordPhyllopod Bed Community ; Maotianshan Shale Biota ; Burgess Shale ; Organic Preservation ; South China ; Fossilization ; Paleoecology ; Diversity ; Worms
Funding ProjectNational Natural Science Foundation of China[40725005] ; National Natural Science Foundation of China[J0530089] ; Ministry of Science and Technology of China[2006CB806401] ; Natural Sciences and Engineering Research Council of Canada (NSERC)
WOS Research AreaGeology ; Paleontology
WOS SubjectGeology ; Paleontology
WOS IDWOS:000272511400011
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Science and Technology of China ; Natural Sciences and Engineering Research Council of Canada (NSERC)
PublisherSEPM-SOC SEDIMENTARY GEOLOGY
Citation statistics
Cited Times:38[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/269
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorZhu, Maoyan (朱茂炎)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Royal Ontario Museum, Dept Nat Hist Palaeobiol, Toronto, ON M5S 2C6, Canada
4.Yunnan Inst Geol Sci, Kunming 650051, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Zhao, Fangchen ,Caron, Jean-Bernard,Hu, Shixue,et al. QUANTITATIVE ANALYSIS OF TAPHOFACIES AND PALEOCOMMUNITIES IN THE EARLY CAMBRIAN CHENGJIANG LAGERSTATTE[J]. PALAIOS,2009,24(11-12):826-839.
APA Zhao, Fangchen ,Caron, Jean-Bernard,Hu, Shixue,&Zhu, Maoyan .(2009).QUANTITATIVE ANALYSIS OF TAPHOFACIES AND PALEOCOMMUNITIES IN THE EARLY CAMBRIAN CHENGJIANG LAGERSTATTE.PALAIOS,24(11-12),826-839.
MLA Zhao, Fangchen ,et al."QUANTITATIVE ANALYSIS OF TAPHOFACIES AND PALEOCOMMUNITIES IN THE EARLY CAMBRIAN CHENGJIANG LAGERSTATTE".PALAIOS 24.11-12(2009):826-839.
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