globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.12.013
论文题名:
Ichnological characteristics of Late Cretaceous hemipelagic and pelagic sediments in a submarine high around the OAE-2 event: A case from the Rybie section, Polish Carpathians
作者: Uchman A.; Rodríguez-Tovar F.J.; Machaniec E.; Kedzierski M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 370
起始页码: 222
结束页码: 231
语种: 英语
英文关键词: Anoxia ; Benthic foraminifers ; Bonarelli Level ; Cenomanian-Turonian ; Oligotrophy ; Trace fossils
英文摘要: The trace fossils Alcyonidiopsis isp., Chondrites isp. (small and large), Palaeophycus isp., Planolites isp., Taenidium isp., Thalassinoides isp., Zoophycos isp., and unnamed small spreite burrow structures have been found in the Cenomanian-Turonian sediments in the Rybie section. They show significant stratigraphic variations in respect to the Bonarelli Level. In the Cenomanian, from the base of the section up to just below the Bonarelli Level (the "fucoid marl" in local lithostratigraphy), a decrease in diversity and abundance of trace fossils and benthic foraminifers is present and related mainly to decreasing benthic food levels. Oxygenation changes have comparatively minor incidence, but at least three thin anoxic layers occur about 2. m below the Bonarelli Level. The Bonarelli Level shows the at least episodically anoxic sedimentation. In the Turonian part, only small Chondrites isp. and Planolites isp. rarely occur. The burial of organic matter and probably benthic food content was extremely low as revealed by red marls. A gradual recovery of environmental conditions is marked by an increase in the diversity and abundance of trace fossils and benthic foraminifers by the Turonian, when grey marls (Zegocina Marl) accumulated above the red marls. The trends in ichnological record are confirmed by data on benthic foraminifers. © 2012 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/69867
Appears in Collections:过去全球变化的重建

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作者单位: Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, 30-063 Kraków, Poland; Departamento de Estratigrafía y Paleontología, Universidad de Granada, 18002 Granada, Spain

Recommended Citation:
Uchman A.,Rodríguez-Tovar F.J.,Machaniec E.,et al. Ichnological characteristics of Late Cretaceous hemipelagic and pelagic sediments in a submarine high around the OAE-2 event: A case from the Rybie section, Polish Carpathians[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,370
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