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Darriwilian (Middle Ordovician) chemostratigraphy linked to graptolite, conodont and trilobite biostratigraphy in the Fågelsång-3 drill core, Scania, Sweden

Bergström, Stig M. ; Ahlberg, Per LU ; Maletz, Jörg ; Lundberg, Frans and Joachimski, Michael M. (2018) In GFF 140(3). p.229-240
Abstract
A recent core drilling in the geologically classical Fågelsång area resulted in a 58.70-m-long drill core through the lowermost Sandbian Sularp Shale, the Darriwilian Almelund Shale and Komstad Limestone, and part of the late Tremadocian to earliest Darriwilian Tøyen Shale. The shales contain zone index graptolites that are used for an update of the standard Darriwilian graptolite zone succession in Baltoscandia in which six zones are now recognized. The Komstad Limestone interval and lowermost part of the Almelund Shale have been
subdivided into four conodont zones. The δ13Corg chemostratigraphy, which has been established through the entire drill core based on 120 closely spaced samples, shows a somewhat subdued... (More)
A recent core drilling in the geologically classical Fågelsång area resulted in a 58.70-m-long drill core through the lowermost Sandbian Sularp Shale, the Darriwilian Almelund Shale and Komstad Limestone, and part of the late Tremadocian to earliest Darriwilian Tøyen Shale. The shales contain zone index graptolites that are used for an update of the standard Darriwilian graptolite zone succession in Baltoscandia in which six zones are now recognized. The Komstad Limestone interval and lowermost part of the Almelund Shale have been
subdivided into four conodont zones. The δ13Corg chemostratigraphy, which has been established through the entire drill core based on 120 closely spaced samples, shows a somewhat subdued development of the middle Darriwilian Isotope Carbon Excursion (MDICE), which is dated in terms of graptolite biostratigraphy. The Fågelsång isotope curve is correlated with a closely similar δ13Ccarb curve from a coeval, apparently stratigraphically essentially continuous, succession at Kårgärde in south-central Sweden, which previously has been subdivided into 13 conodont zones and subzones. For the first time, these conodont zonal units can be calibrated with Fågelsång graptolite zones using δ13Corg chemostratigraphy. The several new results of this study are expected to be useful for assessing biostratigraphic relations between units in shale and carbonate facies in Baltoscandia and elsewhere in the world. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Baltoscandia; conodonts; graptolites; biostratigraphy; chemostratigraphy; Middle Ordovician
in
GFF
volume
140
issue
3
pages
12 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85047127983
ISSN
2000-0863
DOI
10.1080/11035897.2018.1466833
language
English
LU publication?
yes
id
553305f9-1cb0-419a-b7b1-4c48a7a7caa1
date added to LUP
2018-11-15 14:56:17
date last changed
2021-10-06 02:27:40
@article{553305f9-1cb0-419a-b7b1-4c48a7a7caa1,
  abstract     = {A recent core drilling in the geologically classical Fågelsång area resulted in a 58.70-m-long drill core through the lowermost Sandbian Sularp Shale, the Darriwilian Almelund Shale and Komstad Limestone, and part of the late Tremadocian to earliest Darriwilian Tøyen Shale. The shales contain zone index graptolites that are used for an update of the standard Darriwilian graptolite zone succession in Baltoscandia in which six zones are now recognized. The Komstad Limestone interval and lowermost part of the Almelund Shale have been<br/>subdivided into four conodont zones. The δ<sup>13</sup>C<sub>org</sub> chemostratigraphy, which has been established through the entire drill core based on 120 closely spaced samples, shows a somewhat subdued development of the middle Darriwilian Isotope Carbon Excursion (MDICE), which is dated in terms of graptolite biostratigraphy. The Fågelsång isotope curve is correlated with a closely similar δ<sup>13</sup>C<sub>carb</sub> curve from a coeval, apparently stratigraphically essentially continuous, succession at Kårgärde in south-central Sweden, which previously has been subdivided into 13 conodont zones and subzones. For the first time, these conodont zonal units can be calibrated with Fågelsång graptolite zones using δ<sup>13</sup>Corg chemostratigraphy. The several new results of this study are expected to be useful for assessing biostratigraphic relations between units in shale and carbonate facies in Baltoscandia and elsewhere in the world.},
  author       = {Bergström, Stig M. and Ahlberg, Per and Maletz, Jörg and Lundberg, Frans and Joachimski, Michael M.},
  issn         = {2000-0863},
  language     = {eng},
  month        = {06},
  number       = {3},
  pages        = {229--240},
  publisher    = {Taylor & Francis},
  series       = {GFF},
  title        = {Darriwilian (Middle Ordovician) chemostratigraphy linked to graptolite, conodont and trilobite biostratigraphy in the Fågelsång-3 drill core, Scania, Sweden},
  url          = {http://dx.doi.org/10.1080/11035897.2018.1466833},
  doi          = {10.1080/11035897.2018.1466833},
  volume       = {140},
  year         = {2018},
}