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First report of a phytogeographically mixed (transitional) Middle-Late Permian fossil wood assemblage from the Hami area, northwest China, and implications for Permian phytogeographical, paleogeographical and paleoclimatic evolution in central Asia

Wei, Xinxiang, Zhang, Xionghua, Shi, G. R., Zhao, Xingmin, Huang, Xing and Luan, Tengfei 2016, First report of a phytogeographically mixed (transitional) Middle-Late Permian fossil wood assemblage from the Hami area, northwest China, and implications for Permian phytogeographical, paleogeographical and paleoclimatic evolution in central Asia, Palaeogeography, palaeoclimatology, palaeoecology, vol. 448, pp. 125-140, doi: 10.1016/j.palaeo.2015.05.004.

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Title First report of a phytogeographically mixed (transitional) Middle-Late Permian fossil wood assemblage from the Hami area, northwest China, and implications for Permian phytogeographical, paleogeographical and paleoclimatic evolution in central Asia
Author(s) Wei, Xinxiang
Zhang, Xionghua
Shi, G. R.ORCID iD for Shi, G. R. orcid.org/0000-0002-5126-4036
Zhao, Xingmin
Huang, Xing
Luan, Tengfei
Journal name Palaeogeography, palaeoclimatology, palaeoecology
Volume number 448
Start page 125
End page 140
Total pages 16
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-04-15
ISSN 0031-0182
Keyword(s) Middle–Late Permian
fossil wood
mixed Permian floras
paleophytogeography
paleoclimate
Xinjiang
China
Summary A diverse and well-preserved fossil wood assemblage is described, for the first time, from the Middle Permian Taerlang Formation and the Upper Permian Quanzijie Formation in the vicinity of the Tianshan Town, Hami City of northwestern China. On the basis of wood microstructure, the fossil woods are classified into three genera and five species, including one new genus: Prototianshanoxylon gen. nov. and two new species: Prototianshanoxylon erdaogouense sp. nov., Prototianshanoxylon hamiense sp. nov. The new genus is characterized by window-like cross-field pitting and mixed tracheid radial wall pitting that suggest a transitional type between araucarioid-type and protopinoid-type pittings.Phytogeographically, the fossil wood assemblage is characterized by an admixture of elements of both temperate Angaran (represented by wood specimens with moderately to well defined growth rings in their secondary xylem) and tropical-subtropical north subregion of the Cathaysian floras (with wood specimens lacking well-defined growth rings). Such a phytogeographically mixed fossil wood assemblage is interpreted to represent a transitional and complex climate condition between a cool temperate and tropical to subtropical zones, showing both seasonal variation and unstable climate conditions. Previously, similarly mixed floras have already been found to exist widely in northern China ranging in age from Early to Late Permian, but the mechanisms thought to be responsible for their formation were varied and remain controversial. In this study, the formation of these mixed Permian floras of North China is linked to the closure of the Tianshan-Hingan seaway coupled with the collision and amalgamation of Siberia with North China and the Tarim block, in a manner much like closing a pair of scissors with the closure of the seaway proceeding gradually and progressively from west to the east.
Language eng
DOI 10.1016/j.palaeo.2015.05.004
Field of Research 040308 Palaeontology (incl Palynology)
0403 Geology
0602 Ecology
0603 Evolutionary Biology
060306 Evolutionary Impacts of Climate Change
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID ARC DP150100690
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080100

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