globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.06.033
论文题名:
A new trace fossil assemblage from the Middle Permian Broughton Formation, southern Sydney Basin (southeastern Australia): Ichnology and palaeoenvironmental significance
作者: Luo M.; Shi G.R.; Lee S.; Yang B.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Crowded Rosselia ichnofabric ; Eastern Gondwana ; Jamberoo Sandstone Member ; Psammichnites ichnofabric ; Wordian
英文摘要: The Permian-Triassic sedimentary succession of the southern Sydney Basin in southeastern Australia contains a wealth of well-preserved trace fossils that are important for systematic ichnological, palaeoecological, and palaeoenvironmental interpretations. In this study, a new ichnofossil assemblage comprising Macaronichnus, Palaeophycus, Psammichnites, Protovirgularia, Rosselia, and Teichichnus is documented from the tide-influenced shoreface deposit of the Middle Permian Jamberoo Sandstone Member of the Broughton Formation. Two distinct ichnofabrics are recognized: i) the Psammichnites ichnofabric characteristic of the upper-middle shoreface deposit; and ii) the crowded Rosselia ichnofabric (CRI) representing the lower shoreface. The Psammichnites-dominated ichnofabric is interpreted to have resulted from opportunistic behaviours of unknown trace makers, whereas the CRI is interpreted to represent possible strategic behaviours of stress-tolerant polychaetes (e.g., terebellid, spionid, and cirratulid polychaetes) in a distal shoreface with high sedimentation rate. Thus, the Psammichnites-crowded Rosselia ichnofabric succession can be considered to represent a response to an environmental shift from proximal to distal shoreface. As such, this study highlights the utility of these two ichnofabrics as stressed environmental indicators. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68109
Appears in Collections:过去全球变化的重建

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作者单位: Deakin University, Geelong, Centre for Integrative Ecology, School of Life and Environmental Sciences, Melbourne Burwood Campus, 221 Burwood Highway, Burwood, VIC 3125, Australia

Recommended Citation:
Luo M.,Shi G.R.,Lee S.,et al. A new trace fossil assemblage from the Middle Permian Broughton Formation, southern Sydney Basin (southeastern Australia): Ichnology and palaeoenvironmental significance[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01
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