Zoophycos composite ichnofabrics and tiers from the Permian neritic facies in South China and south-eastern Australia

Gong, Yi-Ming, Shi, G. R., Zhang, Li-Jun and Weldon, Elizabeth. A 2010, Zoophycos composite ichnofabrics and tiers from the Permian neritic facies in South China and south-eastern Australia, Lethaia : an international journal of paleontology and stratigraphy, vol. 43, no. 2, pp. 182-196.

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Title Zoophycos composite ichnofabrics and tiers from the Permian neritic facies in South China and south-eastern Australia
Formatted title Zoophycos composite ichnofabrics and tiers from the Permian neritic facies in South China and south-eastern Australia
Author(s) Gong, Yi-Ming
Shi, G. R.
Zhang, Li-Jun
Weldon, Elizabeth. A
Journal name Lethaia : an international journal of paleontology and stratigraphy
Volume number 43
Issue number 2
Start page 182
End page 196
Total pages 15
Publisher Wiley - Blackwell Publishing Ltd.
Place of publication Oxford, England
Publication date 2010-06
ISSN 0024-1164
1502-3931
Keyword(s) Composite ichnofabric
Permian,
South China
South-Eastern Australia
Tier
Zoophycos
Summary Zoophycos composite ichnofabrics (ZCI) comprising two or more suites of the same form of Zoophycos are widespread and densely distributed in Early and Middle Permian (Cisuralian–Guadalupian) neritic limestones (Qixia and Maokou Formations) of palaeotropical origin in the Laibin area, Guangxi, South China. Similar ZCI also occur in neritic greywackes of glaciomarine origin from the Middle Permian (Guadalupian) Westley Park Sandstone Member (Broughton Formation) in the southern Sydney Basin, southeastern Australia. Zoophycos from both regions consists of planar spreite with major and minor lamellae and a cylindrical tunnel interpreted as a marginal tube and ⁄ or axial shaft. The cylindrical tunnel is herein considered to be an essential component of Zoophycos, and thus can be used to define and characterize the morphological variability of Zoophycos. It is suggested that the variation of spreite and major and minor lamellae originated from the different morphologies and migration manners of the cylindrical tunnel. The shallowest, shallow, middle and deepest Zoophycos tiers have been distinguished in ZCI on the basis of cross-cutting relationships, the soft-sediment deformation and the contrast in colour between Zoophycos and its host rock. The multiple tiers may represent the substrate consistency spectrum from a softground through a stiffground to a firmground.The different Zoophycos tiers may have been constructed by tracemakers of either different or the same taxonomic affinities in response to the gradual accretion and lithification of sediment layers on the seafloor. The tracemakers appeared to be very sensitive to neither climate nor lithology. The width of the planar spreiten of Zoophycos decreases slightly with the depth of tiering in ZCI
Language eng
Field of Research 040308 Palaeontology (incl Palynology)
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2009, The Authors, Journal compilation 2009 The Lethaia Foundation
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030440

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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