DOI: 10.1016/j.palaeo.2015.12.024
论文题名: Early Jurassic microbial mats—A potential response to reduced biotic activity in the aftermath of the end-Triassic mass extinction event
作者: Peterffy O. ; Calner M. ; Vajda V.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 464 起始页码: 76
结束页码: 85
语种: 英语
英文关键词: Cyanobacteria
; Hettangian
; Mass extinction
; Microbial mat
; Sweden
; Wrinkle structures
英文摘要: Wrinkle structures are microbially induced sedimentary structures (MISS) formed by cyanobacteria and are common in pre-Cambrian and Cambrian siltstones and sandstones but are otherwise rare in the Phanerozoic geological record. This paper reports the first discovery of Mesozoic wrinkle structures from Sweden. These are preserved in fine-grained and organic-rich heterolithic strata of the Lower Jurassic (Hettangian) Höganäs Formation in Skåne, southern Sweden. The strata formed in a low-energy, shallow subtidal setting in the marginal parts of the Danish rift-basin. Palynological analyses of fine-grained sandstones hosting the wrinkle structures show that the local terrestrial environment probably consisted of a wetland hosting ferns, cypress and the extinct conifer family Cheirolepidaceae. Palynostratigraphy indicates a Hettangian age, still within the floral recovery phase following the end-Triassic mass extinction event. The finding of wrinkle structures is significant as the presence of microbial mats in the shallow subtidal zone, (in a deeper setting compared to where modern epibenthic microbial mats grow) suggests decreased benthic biodiversity and suppressed grazing in shallow marine environments in the early aftermath of the end-Triassic mass extinction event. © 2015 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68175
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geology, Lund University, Lund, Sweden; Swedish Museum of Natural History, P.O. Box 50007, Stockholm, Sweden
Recommended Citation:
Peterffy O.,Calner M.,Vajda V.. Early Jurassic microbial mats—A potential response to reduced biotic activity in the aftermath of the end-Triassic mass extinction event[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,464