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Biostratigraphical and palaeoecological significance of graptolites, trilobites and conodonts in the Middle-Upper Ordovician Anderso Shale: an unusual 'mixed facies' deposit in Jamtland, central Sweden

Pålsson, Christian LU ; Månsson, Kristina LU and Bergstrom, SM (2002) In Transactions of the Royal Society of Edinburgh. Earth Sciences 93. p.35-57
Abstract
Although only about 20 m thick, the Anderso Shale contains one of the most diverse, if not the most diverse, late Middle-early Late Ordovician faunas known in Baltoscandia. It includes more than 20 trilobite species, more than 20 species of other shelly fossils, about 10 graptolite species, and about 20 conodont species. Based on its lithology, its geographical position near the foreland basin margin, and the presence of trilobites of the raphiophorid association and conodonts of the Periodon-Pygodus biofacies, this formation is interpreted to represent an outer shelf-upper slope (ramp) deposit laid down in moderately deep water. The co-occurrence of some widespread and biostratigraphically diagnostic conodonts, graptolites and trilobites... (More)
Although only about 20 m thick, the Anderso Shale contains one of the most diverse, if not the most diverse, late Middle-early Late Ordovician faunas known in Baltoscandia. It includes more than 20 trilobite species, more than 20 species of other shelly fossils, about 10 graptolite species, and about 20 conodont species. Based on its lithology, its geographical position near the foreland basin margin, and the presence of trilobites of the raphiophorid association and conodonts of the Periodon-Pygodus biofacies, this formation is interpreted to represent an outer shelf-upper slope (ramp) deposit laid down in moderately deep water. The co-occurrence of some widespread and biostratigraphically diagnostic conodonts, graptolites and trilobites makes it possible directly to compare distribution patterns of these fossils, establish ties between graptolite and conodont zones, and correlate the formation with units elsewhere in Europe, North America and China. Stratigraphically and faunally, the Anderso Shale is of particular interest in straddling the Middle-Upper Ordovician Series boundary as this boundary is recognised in the new global classification of the Ordovician System. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
keywords
biostratigraphy, palaeoecology, Sweden
in
Transactions of the Royal Society of Edinburgh. Earth Sciences
volume
93
pages
35 - 57
publisher
Royal Society of Edinburgh
external identifiers
  • wos:000178960600003
  • scopus:0036404896
ISSN
0263-5933
language
English
LU publication?
yes
id
aa4078c5-fc8a-431d-917a-d419140f626d (old id 324360)
alternative location
http://www.ingentaconnect.com/content/rse/tes/2002/00000093/00000001/art00003
date added to LUP
2007-11-08 09:41:56
date last changed
2017-12-04 10:36:19
@article{aa4078c5-fc8a-431d-917a-d419140f626d,
  abstract     = {Although only about 20 m thick, the Anderso Shale contains one of the most diverse, if not the most diverse, late Middle-early Late Ordovician faunas known in Baltoscandia. It includes more than 20 trilobite species, more than 20 species of other shelly fossils, about 10 graptolite species, and about 20 conodont species. Based on its lithology, its geographical position near the foreland basin margin, and the presence of trilobites of the raphiophorid association and conodonts of the Periodon-Pygodus biofacies, this formation is interpreted to represent an outer shelf-upper slope (ramp) deposit laid down in moderately deep water. The co-occurrence of some widespread and biostratigraphically diagnostic conodonts, graptolites and trilobites makes it possible directly to compare distribution patterns of these fossils, establish ties between graptolite and conodont zones, and correlate the formation with units elsewhere in Europe, North America and China. Stratigraphically and faunally, the Anderso Shale is of particular interest in straddling the Middle-Upper Ordovician Series boundary as this boundary is recognised in the new global classification of the Ordovician System.},
  author       = {Pålsson, Christian and Månsson, Kristina and Bergstrom, SM},
  issn         = {0263-5933},
  keyword      = {biostratigraphy,palaeoecology,Sweden},
  language     = {eng},
  pages        = {35--57},
  publisher    = {Royal Society of Edinburgh},
  series       = {Transactions of the Royal Society of Edinburgh. Earth Sciences},
  title        = {Biostratigraphical and palaeoecological significance of graptolites, trilobites and conodonts in the Middle-Upper Ordovician Anderso Shale: an unusual 'mixed facies' deposit in Jamtland, central Sweden},
  volume       = {93},
  year         = {2002},
}