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A palynological study from Sweden reveals stable terrestrial environments during Late Silurian extreme marine conditions

Mehlqvist, Kristina LU ; Wigforss-Lange, Jane LU and Vajda, Vivi LU (2015) In Earth and Environmental Science Transactions of the Royal Society of Edinburgh 105(3). p.149-158
Abstract
A palynological study of the upper Silurian Oved-Ramsasa Group in Skane, Sweden yields a well preserved spore assemblage with low relative abundances of marine microfossils. In total, 26 spore taxa represented by 15 genera were identified. The spore assemblage is dominated by long-ranging cryptospore taxa, and the trilete spore Ambitisporites avitus-dilutus. However, key-species identified include Artemopyra radiata, Hispanaediscus lamontii, H. major, H. verrucatus, Scylaspora scripta and Synorisporites cf. libycus. Importantly, Scylaspora klintaensis was identified, allowing correlation with the Klinta 1 drillcore (Skane). A Ludlow age is inferred for the exposed succession, which agrees well with previous conodont stratigraphy. The... (More)
A palynological study of the upper Silurian Oved-Ramsasa Group in Skane, Sweden yields a well preserved spore assemblage with low relative abundances of marine microfossils. In total, 26 spore taxa represented by 15 genera were identified. The spore assemblage is dominated by long-ranging cryptospore taxa, and the trilete spore Ambitisporites avitus-dilutus. However, key-species identified include Artemopyra radiata, Hispanaediscus lamontii, H. major, H. verrucatus, Scylaspora scripta and Synorisporites cf. libycus. Importantly, Scylaspora klintaensis was identified, allowing correlation with the Klinta 1 drillcore (Skane). A Ludlow age is inferred for the exposed succession, which agrees well with previous conodont stratigraphy. The organic residue is dominated by phytodebris and spores, but with high relative abundances of acritarchs at two levels, possibly related to flooding surfaces. Based on the palynofacies analysis, a near-shore marine environment is proposed. The close proximity to land is inferred by the high proportions of spores, and the dispersed assemblage most likely represents the local flora growing on delta plains. The palynological signal also infers a stable terrestrial environment and vegetation, in contrast to unstable conditions in the marine environment characterised by ooid formation in an evaporitic environment. Comparisons with coeval spore assemblages from Gotland, Avalonia and Laurentia show relatively close similarities in taxonomic composition at the generic level. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cryptospores, early land plants, Klinta, Ludfordian, sea level, stratigraphy
in
Earth and Environmental Science Transactions of the Royal Society of Edinburgh
volume
105
issue
3
pages
149 - 158
publisher
Royal Society of Edinburgh
external identifiers
  • wos:000356161900001
  • scopus:84930866085
ISSN
1755-6929
DOI
10.1017/S1755691015000043
language
English
LU publication?
yes
id
52283d4b-1f7e-4eb0-8834-79f73e5848e4 (old id 7601973)
date added to LUP
2015-07-22 16:22:36
date last changed
2017-09-10 03:16:42
@article{52283d4b-1f7e-4eb0-8834-79f73e5848e4,
  abstract     = {A palynological study of the upper Silurian Oved-Ramsasa Group in Skane, Sweden yields a well preserved spore assemblage with low relative abundances of marine microfossils. In total, 26 spore taxa represented by 15 genera were identified. The spore assemblage is dominated by long-ranging cryptospore taxa, and the trilete spore Ambitisporites avitus-dilutus. However, key-species identified include Artemopyra radiata, Hispanaediscus lamontii, H. major, H. verrucatus, Scylaspora scripta and Synorisporites cf. libycus. Importantly, Scylaspora klintaensis was identified, allowing correlation with the Klinta 1 drillcore (Skane). A Ludlow age is inferred for the exposed succession, which agrees well with previous conodont stratigraphy. The organic residue is dominated by phytodebris and spores, but with high relative abundances of acritarchs at two levels, possibly related to flooding surfaces. Based on the palynofacies analysis, a near-shore marine environment is proposed. The close proximity to land is inferred by the high proportions of spores, and the dispersed assemblage most likely represents the local flora growing on delta plains. The palynological signal also infers a stable terrestrial environment and vegetation, in contrast to unstable conditions in the marine environment characterised by ooid formation in an evaporitic environment. Comparisons with coeval spore assemblages from Gotland, Avalonia and Laurentia show relatively close similarities in taxonomic composition at the generic level.},
  author       = {Mehlqvist, Kristina and Wigforss-Lange, Jane and Vajda, Vivi},
  issn         = {1755-6929},
  keyword      = {cryptospores,early land plants,Klinta,Ludfordian,sea level,stratigraphy},
  language     = {eng},
  number       = {3},
  pages        = {149--158},
  publisher    = {Royal Society of Edinburgh},
  series       = {Earth and Environmental Science Transactions of the Royal Society of Edinburgh},
  title        = {A palynological study from Sweden reveals stable terrestrial environments during Late Silurian extreme marine conditions},
  url          = {http://dx.doi.org/10.1017/S1755691015000043},
  volume       = {105},
  year         = {2015},
}