Correlation of Silurian bentonites from Gotland and the eastern Baltic using sanidine phenocryst composition, and biostratigraphical consequences
(2008) In Journal of the Geological Society 165. p.211-220- Abstract
- Silurian bentonites from Sweden and the eastern Baltic are correlated using XRD analysis of sanidine composition. Identifying the same bentonite in different sections has constrained correlations between the conodont, graptolite and chitinozoan zonations. Three bentonites correlate the Cyrtograptus murchisoni Zone with the upper part of the Pterospathodus amorphognathoides Zone and both the Lower and the Upper Pseudooneotodus bicornis conodont biozones at their type locality. Thus the base of the Llandovery-Wenlock boundary stratotype can be correlated with a level in the upper part of the Cyrtograptus murchisoni graptolite Biozone. Identifying the Y Bentonite (Gotland, Sweden) in eastern Baltic drill-cores shows that the base of the... (More)
- Silurian bentonites from Sweden and the eastern Baltic are correlated using XRD analysis of sanidine composition. Identifying the same bentonite in different sections has constrained correlations between the conodont, graptolite and chitinozoan zonations. Three bentonites correlate the Cyrtograptus murchisoni Zone with the upper part of the Pterospathodus amorphognathoides Zone and both the Lower and the Upper Pseudooneotodus bicornis conodont biozones at their type locality. Thus the base of the Llandovery-Wenlock boundary stratotype can be correlated with a level in the upper part of the Cyrtograptus murchisoni graptolite Biozone. Identifying the Y Bentonite (Gotland, Sweden) in eastern Baltic drill-cores shows that the base of the Eisenackitina lagena chitinozoan Biozone is close to the base of the K patula conodont Biozone, which is coeval with an upper part of the C rigidus graptolite Zone. Sanidine data from the Grotlingbo Bentonite fit well with previous correlations. Some bentonites from Gotland with distinct sanidine compositions and bulk geochemistries have not yet been identified elsewhere. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/591654
- author
- Kiipli, T. ; L, Jeppsson ; Kallaste, T and Söderlund, Ulf LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Geological Society
- volume
- 165
- pages
- 211 - 220
- publisher
- Geological Society of London
- external identifiers
-
- wos:000253287800017
- scopus:38949199348
- ISSN
- 2041-479X
- language
- English
- LU publication?
- yes
- id
- 76abc2c4-f39c-4081-8cc5-0f975273ca7d (old id 591654)
- date added to LUP
- 2016-04-01 12:26:32
- date last changed
- 2022-04-21 07:32:20
@article{76abc2c4-f39c-4081-8cc5-0f975273ca7d, abstract = {{Silurian bentonites from Sweden and the eastern Baltic are correlated using XRD analysis of sanidine composition. Identifying the same bentonite in different sections has constrained correlations between the conodont, graptolite and chitinozoan zonations. Three bentonites correlate the Cyrtograptus murchisoni Zone with the upper part of the Pterospathodus amorphognathoides Zone and both the Lower and the Upper Pseudooneotodus bicornis conodont biozones at their type locality. Thus the base of the Llandovery-Wenlock boundary stratotype can be correlated with a level in the upper part of the Cyrtograptus murchisoni graptolite Biozone. Identifying the Y Bentonite (Gotland, Sweden) in eastern Baltic drill-cores shows that the base of the Eisenackitina lagena chitinozoan Biozone is close to the base of the K patula conodont Biozone, which is coeval with an upper part of the C rigidus graptolite Zone. Sanidine data from the Grotlingbo Bentonite fit well with previous correlations. Some bentonites from Gotland with distinct sanidine compositions and bulk geochemistries have not yet been identified elsewhere.}}, author = {{Kiipli, T. and L, Jeppsson and Kallaste, T and Söderlund, Ulf}}, issn = {{2041-479X}}, language = {{eng}}, pages = {{211--220}}, publisher = {{Geological Society of London}}, series = {{Journal of the Geological Society}}, title = {{Correlation of Silurian bentonites from Gotland and the eastern Baltic using sanidine phenocryst composition, and biostratigraphical consequences}}, volume = {{165}}, year = {{2008}}, }