globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.10.036
论文题名:
Event beds or condensed unit? Analysis of a wood-log concentration in the Upper Jurassic of the Kachchh Basin, western India
作者: Fürsich F.T.; Alberti M.; Pandey D.K.; Rai J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 466
起始页码: 406
结束页码: 415
语种: 英语
英文关键词: Ammonites ; Flash floods ; Oxfordian ; Palaeoenvironmental analysis ; Sediment starvation
英文摘要: The 2-m-thick Wood-Log Bed is a highly ferruginous Middle Oxfordian rock unit exposed in the dry bed of the river Tramau in the Wagad Uplift of the eastern Kachchh Basin, western India, and composed of several layers. The bed contains, at several levels, permineralised conifer wood logs, seeds (Carpolites), cones (Araucarites), leaves (Brachyphyllum, Podozamites), possible bennettitalean flowers (?Williamsonia), and abundant wood debris in a poorly sorted muddy sandstone with scattered coarse quartz grains. The wood concentration is interpreted as the result of episodic flash floods in the hinterland situated in the east. Associated with the wood fossils are abundant ammonites which, together with the ferruginous nature of the sediment, point to offshore sediment starvation. Decay of the plant material might have led to widespread anoxia at the sea floor which restricted the benthic macrofauna for much of the time. Thus, the Wood-Log Bed is the product of two processes, episodic flash floods and sediment starvation. Signs of these processes can be seen in age-equivalent sediments throughout the Kachchh Basin. © 2016 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/68029
Appears in Collections:过去全球变化的重建

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作者单位: FG Paläoumwelt, GeoZentrum Nordbayern der Friedrich-Alexander Universität Erlangen-Nürnberg, Loewenichstrasse 28, Erlangen, Germany; Institut für Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Ludewig Meyn-Strasse 10, Kiel, Germany; Department of Geology, University of Rajasthan, JLN Marg, Jaipur, Rajasthan, India; Birbal Sahni Institute of Palaeosciences, 53-University Road, Lucknow, India

Recommended Citation:
Fürsich F.T.,Alberti M.,Pandey D.K.,et al. Event beds or condensed unit? Analysis of a wood-log concentration in the Upper Jurassic of the Kachchh Basin, western India[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,466
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