Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway
Palynostratigraphy and palynofacies analyses are applied to identify transgressive-regressive sequences and changes in paleoenvironment through the Middle Jurassic–Early Cretaceous succession of the Ramså Basin on Andøya. The conglomerate, the succeeding lacustrine-swamp deposits of the Hestberget a...
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2021
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ftdoajarticles:oai:doaj.org/article:83313bed14f34185a534ca38b3fde01e 2023-05-15T13:25:35+02:00 Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway Morten Smelror 2021-08-01T00:00:00Z https://doi.org/10.3390/geosciences11090354 https://doaj.org/article/83313bed14f34185a534ca38b3fde01e EN eng MDPI AG https://www.mdpi.com/2076-3263/11/9/354 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences11090354 2076-3263 https://doaj.org/article/83313bed14f34185a534ca38b3fde01e Geosciences, Vol 11, Iss 354, p 354 (2021) Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.3390/geosciences11090354 2022-12-31T10:10:12Z Palynostratigraphy and palynofacies analyses are applied to identify transgressive-regressive sequences and changes in paleoenvironment through the Middle Jurassic–Early Cretaceous succession of the Ramså Basin on Andøya. The conglomerate, the succeeding lacustrine-swamp deposits of the Hestberget and Kullgrøfta members (Ramså Formation) and the overlying terrestrial to marginal marine deposits of the lower Bonteigen Member (Ramså Formation), comprise the Bajocian T-R sequence. Bathonian–Oxfordian strata appear to be missing in the studied boreholes, and the second T-R cycle spans the Kimmeridgian to Berriasian open marine deposits of the upper Bonteigen Member and the Dragneset Formation (Breisanden, Taumhølet and Ratjønna members). The overlying Nybrua Formation comprises a condensed marine succession of Valanginian–Early Barremian calcareous sandstone and marl, followed by brownish-red siltstone. The upper T-R sequence (Skarstein Formation) consists of marine transgressive Barremian dark siltstones, silty shales and mudstones, followed by dark mudstone and shale. Marine palynomorphs recovered in these stacked marine slope turbidite sediments are of Late Barremian age, but possibly the youngest T-R cycle also includes Aptian deposits elsewhere in the basin. Article in Journal/Newspaper Andøya Northern Norway Directory of Open Access Journals: DOAJ Articles Norway Andøya ENVELOPE(13.982,13.982,68.185,68.185) Skarstein ENVELOPE(16.367,16.367,68.983,68.983) Breisanden ENVELOPE(6.094,6.094,62.587,62.587) Dragneset ENVELOPE(16.092,16.092,69.181,69.181) Hestberget ENVELOPE(15.400,15.400,67.157,67.157) Geosciences 11 9 354 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments Geology QE1-996.5 |
spellingShingle |
Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments Geology QE1-996.5 Morten Smelror Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
topic_facet |
Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments Geology QE1-996.5 |
description |
Palynostratigraphy and palynofacies analyses are applied to identify transgressive-regressive sequences and changes in paleoenvironment through the Middle Jurassic–Early Cretaceous succession of the Ramså Basin on Andøya. The conglomerate, the succeeding lacustrine-swamp deposits of the Hestberget and Kullgrøfta members (Ramså Formation) and the overlying terrestrial to marginal marine deposits of the lower Bonteigen Member (Ramså Formation), comprise the Bajocian T-R sequence. Bathonian–Oxfordian strata appear to be missing in the studied boreholes, and the second T-R cycle spans the Kimmeridgian to Berriasian open marine deposits of the upper Bonteigen Member and the Dragneset Formation (Breisanden, Taumhølet and Ratjønna members). The overlying Nybrua Formation comprises a condensed marine succession of Valanginian–Early Barremian calcareous sandstone and marl, followed by brownish-red siltstone. The upper T-R sequence (Skarstein Formation) consists of marine transgressive Barremian dark siltstones, silty shales and mudstones, followed by dark mudstone and shale. Marine palynomorphs recovered in these stacked marine slope turbidite sediments are of Late Barremian age, but possibly the youngest T-R cycle also includes Aptian deposits elsewhere in the basin. |
format |
Article in Journal/Newspaper |
author |
Morten Smelror |
author_facet |
Morten Smelror |
author_sort |
Morten Smelror |
title |
Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
title_short |
Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
title_full |
Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
title_fullStr |
Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
title_full_unstemmed |
Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway |
title_sort |
palynostratigraphy, palynofacies, t-r cycles and paleoenvironments in the middle jurassic–early cretaceous ramså basin, andøya, northern norway |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/geosciences11090354 https://doaj.org/article/83313bed14f34185a534ca38b3fde01e |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) ENVELOPE(16.367,16.367,68.983,68.983) ENVELOPE(6.094,6.094,62.587,62.587) ENVELOPE(16.092,16.092,69.181,69.181) ENVELOPE(15.400,15.400,67.157,67.157) |
geographic |
Norway Andøya Skarstein Breisanden Dragneset Hestberget |
geographic_facet |
Norway Andøya Skarstein Breisanden Dragneset Hestberget |
genre |
Andøya Northern Norway |
genre_facet |
Andøya Northern Norway |
op_source |
Geosciences, Vol 11, Iss 354, p 354 (2021) |
op_relation |
https://www.mdpi.com/2076-3263/11/9/354 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences11090354 2076-3263 https://doaj.org/article/83313bed14f34185a534ca38b3fde01e |
op_doi |
https://doi.org/10.3390/geosciences11090354 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
9 |
container_start_page |
354 |
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1766386363449475072 |