DOI: 10.1016/j.palaeo.2014.02.030
论文题名: Palaeoenvironment of the Upper Cretaceous (Coniacian) concretion-bearing Lagerstätten from Poland
作者: Trzesiok D. ; Krzykawski T. ; Niedźwiedzki R. ; Brom K. ; Gorzelak P. ; Salamon M.A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 401 起始页码: 154
结束页码: 165
语种: 英语
英文关键词: Concentration-Lagerstätten
; Concretions
; Decapods
; Palaeoenvironment
; Siderite
英文摘要: Abundantly fossiliferous Upper Cretaceous sediments including decapod remains in the region of Stary Waliszów (Southern Poland) have been known for many years. To date, however, no study has dealt specifically with detailed palaeoenvironmental and palaeoecological reconstruction. The origin of these sediments is still uncertain and has been the source of considerable confusion and controversy, mainly due to the strong bioturbation and decalcification of these sediments. By using the fossil record, comparative taphonomy and geochemical analyses of concretions, we provide new insights into the paleoenvironment and the paleoecology of this unique Coniacian ecosystem.On the basis of ichno- and body fossil assemblages composed almost exclusively of benthic organisms such as decapods, molluscs and echinoderms, which are commonly disarticulated but rarely abraded, we suggest that the fossiliferous sediments in Stary Waliszów were formed in shallow, normal saline and well-oxygenated waters of the upper sublittoral zone with moderate sedimentation rate and low turbulence of waters. The presence of angular terrigenous clasts, well-preserved delicate land flora and the near absence of planktonic and nektonic fossils strongly imply proximity to the land. Recorded taxa inhabited a soft-bottom environment. Some organisms were fossilized inside siderite concretions. These concretions were formed within the sediment below the zone of active bioturbation during the early stage of diagenesis. Remarkable preservation of decapod remains is due to phosphatization, which replaced the cuticle. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69381
Appears in Collections: 过去全球变化的重建
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作者单位: University of Silesia, Faculty of Earth Sciences, Bedzińska Str. 60, 41-200 Sosnowiec, Poland; Wrocław University, Institute of Geological Sciences, Cybulskiego 30, 50-204 Wrocław, Poland; Institute of Paleobiology, Polish Academy of Sciences, Twarda Str. 51/55, PL-00-818 Warsaw, Poland
Recommended Citation:
Trzesiok D.,Krzykawski T.,Niedźwiedzki R.,et al. Palaeoenvironment of the Upper Cretaceous (Coniacian) concretion-bearing Lagerstätten from Poland[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,401