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First evidence of Devonian strata in Sweden - A palynological investigation of Ovedskloster drillcores 1 and 2, Skane, Sweden

Mehlqvist, Kristina LU ; Steemans, Philippe and Vajda, Vivi LU (2015) In Review of Palaeobotany and Palynology 221. p.144-159
Abstract
Palynological analyses were carried out on 50 samples from the Ovedskloster 1 (O1) and 2 drillcores (O2), southern Sweden. The study revealed well-preserved palynological assemblages including 77 spore species in 28 genera, and some additional forms retained under open nomenclature. The spore assemblages are collectively dominated by trilete spores in terms of abundance and diversity and have been ascribed to two informal palynozones (Assemblage A and Assemblage B), based on the representation of spore taxa. The presence of the spore species Acinosporites salopiensis, Chelinohilates erraticus, Cymbohilates allenii, Cymbohilates allenii var. magnus, and Retusotriletes maccullockii indicates that the stratigraphic succession spans the... (More)
Palynological analyses were carried out on 50 samples from the Ovedskloster 1 (O1) and 2 drillcores (O2), southern Sweden. The study revealed well-preserved palynological assemblages including 77 spore species in 28 genera, and some additional forms retained under open nomenclature. The spore assemblages are collectively dominated by trilete spores in terms of abundance and diversity and have been ascribed to two informal palynozones (Assemblage A and Assemblage B), based on the representation of spore taxa. The presence of the spore species Acinosporites salopiensis, Chelinohilates erraticus, Cymbohilates allenii, Cymbohilates allenii var. magnus, and Retusotriletes maccullockii indicates that the stratigraphic succession spans the Silurian-Devonian boundary (Pridoli-Lochkovian), and thus constitutes the first robust evidence of Devonian strata on the Swedish mainland. These results have implications for the age of fossil faunas (e.g. fish) from the same deposits, previously dated as late Silurian. Palynofacies analyses reveal a shallowing-upward succession with nearshore marine marls at the base of the investigated core, grading into sandstones in conjunction with a decrease in the relative abundance of marine palynomorphs. The uppermost 70 m are mainly represented by red sandstones that are devoid of recognizable palynomorphs and host only phytodebris. We interpret this interval to represent predominantly paralic to fluvial deposits equivalent to fades represented in the Old Red Sandstone of Britain. (C) 2015 The Authors. Published by Elsevier B.V. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Silurian, Early land plants, Palynofacies, Old red sandstone
in
Review of Palaeobotany and Palynology
volume
221
pages
144 - 159
publisher
Elsevier
external identifiers
  • wos:000361777900014
  • scopus:84936966723
ISSN
0034-6667
DOI
10.1016/j.revpalbo.2015.06.007
language
English
LU publication?
yes
id
4661fed7-18f1-40ee-bbcc-665a9f2f7007 (old id 8058584)
date added to LUP
2015-10-21 09:18:42
date last changed
2017-01-01 06:23:05
@article{4661fed7-18f1-40ee-bbcc-665a9f2f7007,
  abstract     = {Palynological analyses were carried out on 50 samples from the Ovedskloster 1 (O1) and 2 drillcores (O2), southern Sweden. The study revealed well-preserved palynological assemblages including 77 spore species in 28 genera, and some additional forms retained under open nomenclature. The spore assemblages are collectively dominated by trilete spores in terms of abundance and diversity and have been ascribed to two informal palynozones (Assemblage A and Assemblage B), based on the representation of spore taxa. The presence of the spore species Acinosporites salopiensis, Chelinohilates erraticus, Cymbohilates allenii, Cymbohilates allenii var. magnus, and Retusotriletes maccullockii indicates that the stratigraphic succession spans the Silurian-Devonian boundary (Pridoli-Lochkovian), and thus constitutes the first robust evidence of Devonian strata on the Swedish mainland. These results have implications for the age of fossil faunas (e.g. fish) from the same deposits, previously dated as late Silurian. Palynofacies analyses reveal a shallowing-upward succession with nearshore marine marls at the base of the investigated core, grading into sandstones in conjunction with a decrease in the relative abundance of marine palynomorphs. The uppermost 70 m are mainly represented by red sandstones that are devoid of recognizable palynomorphs and host only phytodebris. We interpret this interval to represent predominantly paralic to fluvial deposits equivalent to fades represented in the Old Red Sandstone of Britain. (C) 2015 The Authors. Published by Elsevier B.V.},
  author       = {Mehlqvist, Kristina and Steemans, Philippe and Vajda, Vivi},
  issn         = {0034-6667},
  keyword      = {Silurian,Early land plants,Palynofacies,Old red sandstone},
  language     = {eng},
  pages        = {144--159},
  publisher    = {Elsevier},
  series       = {Review of Palaeobotany and Palynology},
  title        = {First evidence of Devonian strata in Sweden - A palynological investigation of Ovedskloster drillcores 1 and 2, Skane, Sweden},
  url          = {http://dx.doi.org/10.1016/j.revpalbo.2015.06.007},
  volume       = {221},
  year         = {2015},
}