The Cambrian–Ordovician succession at Lanna, Sweden : stratigraphy and depositional environments
(2018) In Estonian Journal of Earth Sciences 67(2). p.133-148- Abstract
- A ca 20 m thick succession of upper Furongian (Cambrian Stage 10) through Middle Ordovician (Darriwilian) strata exposed at Lanna, in the province of Närke, south-central Sweden, is described. The upper Furongian is represented by the Alum Shale Formation and reflects an overall shallowing trend that ultimately resulted in emergence above sea level and subaerial conditions. Hence, as in most other areas in south-central Sweden, the boundary between the Cambrian and the Ordovician is marked by a prominent disconformity and significant hiatus. In Närke, the hiatus spans the middle Stage 10 through the uppermost Tremadocian or lowermost Floian. The presence of stromatolites indicates quite shallow marine conditions during the latest Cambrian.... (More)
- A ca 20 m thick succession of upper Furongian (Cambrian Stage 10) through Middle Ordovician (Darriwilian) strata exposed at Lanna, in the province of Närke, south-central Sweden, is described. The upper Furongian is represented by the Alum Shale Formation and reflects an overall shallowing trend that ultimately resulted in emergence above sea level and subaerial conditions. Hence, as in most other areas in south-central Sweden, the boundary between the Cambrian and the Ordovician is marked by a prominent disconformity and significant hiatus. In Närke, the hiatus spans the middle Stage 10 through the uppermost Tremadocian or lowermost Floian. The presence of stromatolites indicates quite shallow marine conditions during the latest Cambrian. The Ordovician succession is characterized by flatly bedded ‘orthoceratite limestone’, belonging to the ‘Latorp’, ‘Lanna’ and ‘Holen’ limestones (‘topoformations’). Widely varying microfacies characteristics in the ‘orthoceratite limestone’ suggest that the depositional environment underwent substantial changes through time, largely due to changes in sea level. A long-term trend of coarsening carbonate textures and more diverse fossil assemblages is seen upwards through the Ordovician succession. Cyclic microfacies patterns probably reflect high-frequency sea-level changes. Comparisons to other parts of Sweden and Baltoscandia reveal consistent patterns in the sedimentary development across a wide geographical area. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/f7521d58-d4dc-433c-8a99-789638a6f657
- author
- Lindskog, Anders LU ; Lindskog, Anna M. L. ; Johansson, Jan V. ; Ahlberg, Per LU and Eriksson, Mats LU
- organization
- publishing date
- 2018-04-03
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Carbonate sedimentology, Microfacies, Palaeoecology, Palaeoenvironment, Baltoscandia
- in
- Estonian Journal of Earth Sciences
- volume
- 67
- issue
- 2
- pages
- 133 - 148
- publisher
- Estonian Academy Publishers
- external identifiers
-
- scopus:85047554258
- ISSN
- 1736-7557
- DOI
- 10.3176/earth.2018.10
- language
- English
- LU publication?
- yes
- id
- f7521d58-d4dc-433c-8a99-789638a6f657
- date added to LUP
- 2019-03-02 22:12:18
- date last changed
- 2022-04-02 06:53:21
@article{f7521d58-d4dc-433c-8a99-789638a6f657,
abstract = {{A ca 20 m thick succession of upper Furongian (Cambrian Stage 10) through Middle Ordovician (Darriwilian) strata exposed at Lanna, in the province of Närke, south-central Sweden, is described. The upper Furongian is represented by the Alum Shale Formation and reflects an overall shallowing trend that ultimately resulted in emergence above sea level and subaerial conditions. Hence, as in most other areas in south-central Sweden, the boundary between the Cambrian and the Ordovician is marked by a prominent disconformity and significant hiatus. In Närke, the hiatus spans the middle Stage 10 through the uppermost Tremadocian or lowermost Floian. The presence of stromatolites indicates quite shallow marine conditions during the latest Cambrian. The Ordovician succession is characterized by flatly bedded ‘orthoceratite limestone’, belonging to the ‘Latorp’, ‘Lanna’ and ‘Holen’ limestones (‘topoformations’). Widely varying microfacies characteristics in the ‘orthoceratite limestone’ suggest that the depositional environment underwent substantial changes through time, largely due to changes in sea level. A long-term trend of coarsening carbonate textures and more diverse fossil assemblages is seen upwards through the Ordovician succession. Cyclic microfacies patterns probably reflect high-frequency sea-level changes. Comparisons to other parts of Sweden and Baltoscandia reveal consistent patterns in the sedimentary development across a wide geographical area.}},
author = {{Lindskog, Anders and Lindskog, Anna M. L. and Johansson, Jan V. and Ahlberg, Per and Eriksson, Mats}},
issn = {{1736-7557}},
keywords = {{Carbonate sedimentology; Microfacies; Palaeoecology; Palaeoenvironment; Baltoscandia}},
language = {{eng}},
month = {{04}},
number = {{2}},
pages = {{133--148}},
publisher = {{Estonian Academy Publishers}},
series = {{Estonian Journal of Earth Sciences}},
title = {{The Cambrian–Ordovician succession at Lanna, Sweden : stratigraphy and depositional environments}},
url = {{http://dx.doi.org/10.3176/earth.2018.10}},
doi = {{10.3176/earth.2018.10}},
volume = {{67}},
year = {{2018}},
}