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Local and trans-Atlantic chemostratigraphic significance of new δ13Ccarb data from the Sandbian and Katian Stages (Middle–Upper Ordovician) of the Oslo region, Norway

Bergström, Stig M.; Bruton, David L.; Schmitz, Birger LU and Terfelt, Fredrik LU (2017) In GFF 139(4). p.289-300
Abstract

Late Sandbian to early Katian δ13Ccarb chemostratigraphy has in Norway been described in only two previous reports that dealt with two geographically rather widely separated areas, namely the Oslo-Asker district and the Nes-Hamar district. No data have been available from the Ordovician outcrop areas between these districts that could help clarify the partly unclear regional stratigraphic relations across the Oslo region. A chemostratigraphic study of the classical road section at Tønnerud in the northwestern Hadeland district about halfway between the previously investigated districts resulted in the recognition of two δ13C excursions, namely one in the uppermost Furuberget Formation tentatively... (More)

Late Sandbian to early Katian δ13Ccarb chemostratigraphy has in Norway been described in only two previous reports that dealt with two geographically rather widely separated areas, namely the Oslo-Asker district and the Nes-Hamar district. No data have been available from the Ordovician outcrop areas between these districts that could help clarify the partly unclear regional stratigraphic relations across the Oslo region. A chemostratigraphic study of the classical road section at Tønnerud in the northwestern Hadeland district about halfway between the previously investigated districts resulted in the recognition of two δ13C excursions, namely one in the uppermost Furuberget Formation tentatively identified as the Guttenberg Isotopic Carbon Excursion and one in the lower Solvang Formation that is classified as the KOPE (RAKVERE) excursion. Based on these results, the Furuberget and Solvang formations are interpreted to be separated by a significant gap in the study area corresponding to the Oandu and lower Rakvere regional Baltoscandic stages. This suggests that the Tønnerud succession is less complete stratigraphically than those in the Oslo-Asker district. Similar gaps are not uncommon in this interval in Baltoscandia and in North America and probably reflect both eustatic and local epeirogenetic movements that make it difficult to establish a regionally applicable sequence stratigraphy.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
biostratigraphy, Hadeland, North America, Norway, Ordovician, δC chemostratigraphy
in
GFF
volume
139
issue
4
pages
289 - 300
publisher
Geological Society of Sweden
external identifiers
  • scopus:85032354326
  • wos:000416892400005
ISSN
1103-5897
DOI
10.1080/11035897.2017.1389983
language
English
LU publication?
yes
id
032066f3-c117-4dc6-87d8-69a4bad1fc05
date added to LUP
2017-11-07 13:19:18
date last changed
2018-02-20 14:34:01
@article{032066f3-c117-4dc6-87d8-69a4bad1fc05,
  abstract     = {<p>Late Sandbian to early Katian δ<sup>13</sup>C<sub>carb</sub> chemostratigraphy has in Norway been described in only two previous reports that dealt with two geographically rather widely separated areas, namely the Oslo-Asker district and the Nes-Hamar district. No data have been available from the Ordovician outcrop areas between these districts that could help clarify the partly unclear regional stratigraphic relations across the Oslo region. A chemostratigraphic study of the classical road section at Tønnerud in the northwestern Hadeland district about halfway between the previously investigated districts resulted in the recognition of two δ<sup>13</sup>C excursions, namely one in the uppermost Furuberget Formation tentatively identified as the Guttenberg Isotopic Carbon Excursion and one in the lower Solvang Formation that is classified as the KOPE (RAKVERE) excursion. Based on these results, the Furuberget and Solvang formations are interpreted to be separated by a significant gap in the study area corresponding to the Oandu and lower Rakvere regional Baltoscandic stages. This suggests that the Tønnerud succession is less complete stratigraphically than those in the Oslo-Asker district. Similar gaps are not uncommon in this interval in Baltoscandia and in North America and probably reflect both eustatic and local epeirogenetic movements that make it difficult to establish a regionally applicable sequence stratigraphy.</p>},
  author       = {Bergström, Stig M. and Bruton, David L. and Schmitz, Birger and Terfelt, Fredrik},
  issn         = {1103-5897},
  keyword      = {biostratigraphy,Hadeland,North America,Norway,Ordovician,δC chemostratigraphy},
  language     = {eng},
  month        = {10},
  number       = {4},
  pages        = {289--300},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {Local and trans-Atlantic chemostratigraphic significance of new δ<sup>13</sup>C<sub>carb</sub> data from the Sandbian and Katian Stages (Middle–Upper Ordovician) of the Oslo region, Norway},
  url          = {http://dx.doi.org/10.1080/11035897.2017.1389983},
  volume       = {139},
  year         = {2017},
}