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New Ordovician-Silurian drill cores from the Siljan impact structure in central Sweden: an integral part of the Swedish Deep Drilling Program

Lehnert, Oliver; Meinhold, Guido; Bergstroem, Stig M.; Calner, Mikael LU ; Ebbestad, Jan Ove R.; Egenhoff, Sven; Frisk, Asa M.; Hannah, Judith L.; Hogstrom, Anette E. S. and Huff, Warren D., et al. (2012) In GFF 134(2). p.87-98
Abstract
New drill cores from the largest known impact structure in Europe, the relict of the Siljan meteorite crater, provide new possibilities to reconstruct Early Palaeozoic marine environments and ecosystems, and to document changes in sedimentary facies, sea level and palaeoclimate in Baltoscandia. The impact crater is an important target of the project "Concentric Impact Structures in the Palaeozoic" within the framework of the "Swedish Deep Drilling Program". Two core sections, Mora 001 and Solberga 1, have been analysed. The sedimentary successions of these core sections include strata of late Tremadocian through late Wenlock ages. Our preliminary studies show not only that several of the classical Palaeozoic units of Sweden are represented... (More)
New drill cores from the largest known impact structure in Europe, the relict of the Siljan meteorite crater, provide new possibilities to reconstruct Early Palaeozoic marine environments and ecosystems, and to document changes in sedimentary facies, sea level and palaeoclimate in Baltoscandia. The impact crater is an important target of the project "Concentric Impact Structures in the Palaeozoic" within the framework of the "Swedish Deep Drilling Program". Two core sections, Mora 001 and Solberga 1, have been analysed. The sedimentary successions of these core sections include strata of late Tremadocian through late Wenlock ages. Our preliminary studies show not only that several of the classical Palaeozoic units of Sweden are represented in the area, but also that other significantly different facies are preserved in the Siljan district. An erosional unconformity representing a substantial hiatus occurs between Middle Ordovician limestone and a Llandovery-Wenlock (Silurian) shale succession in the western part of the Siljan structure and suggests an extended period of uplift and erosion. This may be related to forebulge migration due to flexural loading by the Caledonian thrust sheet to the west. Thus, this part of Sweden, previously regarded as a stable cratonic area, presumably was affected by the Caledonian collision between Baltica and Laurentia. (Less)
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publication status
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subject
keywords
Sweden, Siljan district, Ordovician, Silurian, impact structure, stratigraphy
in
GFF
volume
134
issue
2
pages
87 - 98
publisher
Geological Society of Sweden
external identifiers
  • wos:000306600000002
  • scopus:84864023595
ISSN
2000-0863
DOI
10.1080/11035897.2012.692707
language
English
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yes
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fb3b1364-ed60-4436-8165-eb73401c5359 (old id 3083101)
date added to LUP
2012-09-24 15:41:53
date last changed
2017-06-11 03:04:43
@article{fb3b1364-ed60-4436-8165-eb73401c5359,
  abstract     = {New drill cores from the largest known impact structure in Europe, the relict of the Siljan meteorite crater, provide new possibilities to reconstruct Early Palaeozoic marine environments and ecosystems, and to document changes in sedimentary facies, sea level and palaeoclimate in Baltoscandia. The impact crater is an important target of the project "Concentric Impact Structures in the Palaeozoic" within the framework of the "Swedish Deep Drilling Program". Two core sections, Mora 001 and Solberga 1, have been analysed. The sedimentary successions of these core sections include strata of late Tremadocian through late Wenlock ages. Our preliminary studies show not only that several of the classical Palaeozoic units of Sweden are represented in the area, but also that other significantly different facies are preserved in the Siljan district. An erosional unconformity representing a substantial hiatus occurs between Middle Ordovician limestone and a Llandovery-Wenlock (Silurian) shale succession in the western part of the Siljan structure and suggests an extended period of uplift and erosion. This may be related to forebulge migration due to flexural loading by the Caledonian thrust sheet to the west. Thus, this part of Sweden, previously regarded as a stable cratonic area, presumably was affected by the Caledonian collision between Baltica and Laurentia.},
  author       = {Lehnert, Oliver and Meinhold, Guido and Bergstroem, Stig M. and Calner, Mikael and Ebbestad, Jan Ove R. and Egenhoff, Sven and Frisk, Asa M. and Hannah, Judith L. and Hogstrom, Anette E. S. and Huff, Warren D. and Juhlin, Christopher and Maletz, Joerg and Stein, Holly J. and Sturkell, Erik and Vandenbroucke, Thijs R. A.},
  issn         = {2000-0863},
  keyword      = {Sweden,Siljan district,Ordovician,Silurian,impact structure,stratigraphy},
  language     = {eng},
  number       = {2},
  pages        = {87--98},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {New Ordovician-Silurian drill cores from the Siljan impact structure in central Sweden: an integral part of the Swedish Deep Drilling Program},
  url          = {http://dx.doi.org/10.1080/11035897.2012.692707},
  volume       = {134},
  year         = {2012},
}