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The lowermost Silurian of Jamtland, central Sweden: conodont biostratigraphy, correlation and biofacies

Dahlqvist, Peter LU and Bergstrom, Stig M (2005) In Transactions of the Royal Society of Edinburgh. Earth Sciences 96(1). p.1-19
Abstract
The Late Ordovician-Early Silurian succession in Jamtland includes the marine Kogsta Siltstone, which is unconformably overlain by the shallow-water Ede Quartzite that grades into the open-marine Berge Limestone. A Hirnantia shelly fauna dates the uppermost Kogsta Siltstone as Hirnantian, and shelly fossils indicate an Aeronian age for the Berge Limestone. Biostratigraphically highly diagnostic conodonts of the early-middle Aeronian Pranognathus tenuis Zone provide the first firm date of the Upper Ede Quartzite and the lowermost Berge Limestone. The Lower Ede Quartzite has not yielded fossils, but sedimentological data suggest it to be of Hirnantian age and reflect the glacio-eustatic low-stand. The contact between the Lower and Upper Ede... (More)
The Late Ordovician-Early Silurian succession in Jamtland includes the marine Kogsta Siltstone, which is unconformably overlain by the shallow-water Ede Quartzite that grades into the open-marine Berge Limestone. A Hirnantia shelly fauna dates the uppermost Kogsta Siltstone as Hirnantian, and shelly fossils indicate an Aeronian age for the Berge Limestone. Biostratigraphically highly diagnostic conodonts of the early-middle Aeronian Pranognathus tenuis Zone provide the first firm date of the Upper Ede Quartzite and the lowermost Berge Limestone. The Lower Ede Quartzite has not yielded fossils, but sedimentological data suggest it to be of Hirnantian age and reflect the glacio-eustatic low-stand. The contact between the Lower and Upper Ede Quartzite, here taken to be the Ordovician-Silurian boundary, appears to be an unconformity associated with a stratigraphic gap that at least includes the Rhuddanian Stage. The biostratigraphically important conodonts Pranognathus tenuis, Kockelella? manitoulinensis, and Pranognathus siluricus are recorded from Sweden for the first time, and these and other conodonts are used for correlations with coeval units in Europe and North America. In a regional review of Aeronian conodont faunas, three intergrading, apparently depth-related, conodont biofacies are recognised, the Jamtland conodonts representing the one characteristic of the shallowest water. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Berge Limestone, Ede Quartzite, North America, Europe, conodonts, palacoecology
in
Transactions of the Royal Society of Edinburgh. Earth Sciences
volume
96
issue
1
pages
1 - 19
publisher
Royal Society of Edinburgh
external identifiers
  • wos:000232637700001
  • scopus:26944495674
ISSN
0263-5933
language
English
LU publication?
yes
id
5470f810-3f85-424e-a131-8f5aaeca1e3b (old id 216769)
alternative location
http://www.ingentaconnect.com/content/rse/tes/2005/00000096/00000001/art00001
date added to LUP
2007-09-21 11:13:26
date last changed
2017-09-10 04:27:03
@article{5470f810-3f85-424e-a131-8f5aaeca1e3b,
  abstract     = {The Late Ordovician-Early Silurian succession in Jamtland includes the marine Kogsta Siltstone, which is unconformably overlain by the shallow-water Ede Quartzite that grades into the open-marine Berge Limestone. A Hirnantia shelly fauna dates the uppermost Kogsta Siltstone as Hirnantian, and shelly fossils indicate an Aeronian age for the Berge Limestone. Biostratigraphically highly diagnostic conodonts of the early-middle Aeronian Pranognathus tenuis Zone provide the first firm date of the Upper Ede Quartzite and the lowermost Berge Limestone. The Lower Ede Quartzite has not yielded fossils, but sedimentological data suggest it to be of Hirnantian age and reflect the glacio-eustatic low-stand. The contact between the Lower and Upper Ede Quartzite, here taken to be the Ordovician-Silurian boundary, appears to be an unconformity associated with a stratigraphic gap that at least includes the Rhuddanian Stage. The biostratigraphically important conodonts Pranognathus tenuis, Kockelella? manitoulinensis, and Pranognathus siluricus are recorded from Sweden for the first time, and these and other conodonts are used for correlations with coeval units in Europe and North America. In a regional review of Aeronian conodont faunas, three intergrading, apparently depth-related, conodont biofacies are recognised, the Jamtland conodonts representing the one characteristic of the shallowest water.},
  author       = {Dahlqvist, Peter and Bergstrom, Stig M},
  issn         = {0263-5933},
  keyword      = {Berge Limestone,Ede Quartzite,North America,Europe,conodonts,palacoecology},
  language     = {eng},
  number       = {1},
  pages        = {1--19},
  publisher    = {Royal Society of Edinburgh},
  series       = {Transactions of the Royal Society of Edinburgh. Earth Sciences},
  title        = {The lowermost Silurian of Jamtland, central Sweden: conodont biostratigraphy, correlation and biofacies},
  volume       = {96},
  year         = {2005},
}