globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.07.005
论文题名:
Comment on: "Dickinsonia liftoff: Evidence of current derived morphologies" by S. D. Evans, M. L. Droser, and J.G. Gehling, Palaeogeography Palaeoclimatology Palaeoecology 434, 28-33 (2015)
作者: Retallack G.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
语种: 英语
英文关键词: Dickinsonia ; Ediacaran ; South Australia ; Taphonomy
英文摘要: Dickinsonia is an enigmatic fossil of Ediacaran age, variously interpreted as a lichen, foraminiferan, placozoan, cnidarian or worm, and now Evans et al. (2015) have provided documentation of new and informative specimens from Nilpena in the Flinders Ranges of South Australia. They consider missing marginal slivers evidence for soft bodied, free living Dickinsonia lifted by current, but such marginal dismemberment of Dickinsonia by currents requires attachment of the rest of the body to the substrate more firmly than body cohesion. Unidirectional orientation of missing pieces of Dickinsonia was considered evidence of shallow marine storms, but such directed currents are found in floods or tsunamis. Finally, curved conchoidal fracture of the missing slivers reveals that the unskeletonized carapace of Dickinsonia was not always soft and flexible, but sometimes hardened, perhaps by desiccation or freezing. © 2015 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/69094
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geological Sciences, University of Oregon, Eugene, OR 97403, United States

Recommended Citation:
Retallack G.J.. Comment on: "Dickinsonia liftoff: Evidence of current derived morphologies" by S. D. Evans, M. L. Droser, and J.G. Gehling, Palaeogeography Palaeoclimatology Palaeoecology 434, 28-33 (2015)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01
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