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标题：Palaeoenvironment of Eocene prodelta in Spitsbergen recorded by the trace fossil Phycosiphon incertum
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作者：Francisco Javier Rodriguez-Tovar ; Jenö Nagy ; Matías Reolid 等
期刊名称：Polar Research
印刷版ISSN：1751-8369
出版年度：2014
卷号：33
期号：0
DOI：10.3402/polar.v33.23786
语种：English
出版社：Co-Action Publishing
摘要：Ichnological, sedimentological and geochemical analyses were conducted on the Eocene Frysjaodden Formation in order to interpret palaeoenvironment prodelta sediments in the Central Basin of Spitsbergen. Phycosiphon incertum is the exclusive ichnotaxon showing differences in size, distribution, abundance and density, and relation to laminated/bioturbated intervals. Large P. incertum mainly occur dispersed, isolated and randomly distributed throughout the weakly laminated/non-laminated intervals. Small P. incertum occur occasionally in patches of several burrows within laminated intervals or as densely packed burrows in thin horizons in laminated intervals or constituting fully bioturbated intervals that are several centimetres thick. Ichnological changes are mainly controlled by oxygenation, although the availability of benthic food cannot be discarded. Changes in oxygenation and rate of sedimentation can be correlated with the registered variations in the Bouma sequence of the distal turbiditic beds within prodeltal shelf sediments.Keywords: Trace fossils; Phycosiphon; Eocene; prodelta; turbiditic sediments; Spitsbergen(Published: 20 October 2014)Citation: Polar Research 2014, 33, 23786, http://dx.doi.org/10.3402/polar.v33.23786
关键词：Trace fossils; Phycosiphon; Eocene; prodelta; turbiditic sediments; Spitsbergen;Trace fossils; Phycosiphon; Eocene; prodelta; turbiditic sediments; Spitsbergen