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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ftmdpi:oai:mdpi.com:/2076-3263/11/9/354/ 2023-08-20T03:59:39+02:00 Palynostratigraphy, Palynofacies, T-R Cycles and Paleoenvironments in the Middle Jurassic–Early Cretaceous Ramså Basin, Andøya, Northern Norway Morten Smelror agris 2021-08-24 application/pdf https://doi.org/10.3390/geosciences11090354 EN eng Multidisciplinary Digital Publishing Institute Sedimentology, Stratigraphy and Palaeontology https://dx.doi.org/10.3390/geosciences11090354 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 11; Issue 9; Pages: 354 Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments T-R sequences Text 2021 ftmdpi https://doi.org/10.3390/geosciences11090354 2023-08-01T02:30:39Z 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. Text Andøya Northern Norway MDPI Open Access Publishing Andøya ENVELOPE(13.982,13.982,68.185,68.185) 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) Norway Skarstein ENVELOPE(16.367,16.367,68.983,68.983) Geosciences 11 9 354 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments T-R sequences |
spellingShingle |
Andøya Jurassic Early Cretaceous palynostratigraphy palynofacies paleoenvironments T-R sequences 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 T-R sequences |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/geosciences11090354 |
op_coverage |
agris |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) 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) ENVELOPE(16.367,16.367,68.983,68.983) |
geographic |
Andøya Breisanden Dragneset Hestberget Norway Skarstein |
geographic_facet |
Andøya Breisanden Dragneset Hestberget Norway Skarstein |
genre |
Andøya Northern Norway |
genre_facet |
Andøya Northern Norway |
op_source |
Geosciences; Volume 11; Issue 9; Pages: 354 |
op_relation |
Sedimentology, Stratigraphy and Palaeontology https://dx.doi.org/10.3390/geosciences11090354 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
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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