A new stratigraphic framework for the early Neoproterozoic successions of Scotland
The circum-North Atlantic region archives three major late-Mesoproterozoic to Neoproterozoic tectonic episodes, the Grenville-Sveconorwegian and Renlandian orogenies followed by rifting and formation of the Iapetus Ocean, and each is bracketed by sedimentary successions that define three megasequenc...
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2021
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ftnerc:oai:nora.nerc.ac.uk:531117 2023-05-15T17:33:42+02:00 A new stratigraphic framework for the early Neoproterozoic successions of Scotland Krabbendam, Maarten Strachan, Rob Prave, Tony 2021-10-06 text http://nora.nerc.ac.uk/id/eprint/531117/ https://nora.nerc.ac.uk/id/eprint/531117/1/jgs2021-054.pdf https://doi.org/10.1144/jgs2021-054 en eng Geological Society of London https://nora.nerc.ac.uk/id/eprint/531117/1/jgs2021-054.pdf Krabbendam, Maarten; Strachan, Rob; Prave, Tony. 2021 A new stratigraphic framework for the early Neoproterozoic successions of Scotland. Journal of the Geological Society, 179 (2), jgs2021-054. https://doi.org/10.1144/jgs2021-054 <https://doi.org/10.1144/jgs2021-054> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1144/jgs2021-054 2023-02-04T19:52:36Z The circum-North Atlantic region archives three major late-Mesoproterozoic to Neoproterozoic tectonic episodes, the Grenville-Sveconorwegian and Renlandian orogenies followed by rifting and formation of the Iapetus Ocean, and each is bracketed by sedimentary successions that define three megasequences. In this context, we summarise sedimentological and geochronological data and propose a new stratigraphic framework for the iconic Torridonian-Moine-Dalradian successions and related units in Scotland. The Iona, Sleat, Torridon and Morar groups of the Scottish mainland and Inner Hebrides, and the Westing, Sand Voe and Yell Sound groups in Shetland, form the newly named Wester Ross Supergroup. They were deposited c. 1000–950 Ma within a foreland basin to the Grenville Orogen and, collectively, are in Megasequence 1. Some of these units record Renlandian orogenesis at c. 960-920 Ma. The newly named Loch Ness Supergroup consists of the Glenfinnan, Loch Eil and Badenoch groups of the Scottish mainland, deposited c. 900–870 Ma and are assigned to Megasequence 2. These units record Knoydartian orogenesis c. 820-725 Ma. The regionally extensive Dalradian Supergroup belongs to Megasequence 3; it was deposited c. <725-500 Ma and records the opening of the Iapetus Ocean, ultimately leading to deposition of the passive margin Cambrian-Ordovician Ardvreck and Durness groups. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Journal of the Geological Society 179 2 jgs2021-054 |
institution |
Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
The circum-North Atlantic region archives three major late-Mesoproterozoic to Neoproterozoic tectonic episodes, the Grenville-Sveconorwegian and Renlandian orogenies followed by rifting and formation of the Iapetus Ocean, and each is bracketed by sedimentary successions that define three megasequences. In this context, we summarise sedimentological and geochronological data and propose a new stratigraphic framework for the iconic Torridonian-Moine-Dalradian successions and related units in Scotland. The Iona, Sleat, Torridon and Morar groups of the Scottish mainland and Inner Hebrides, and the Westing, Sand Voe and Yell Sound groups in Shetland, form the newly named Wester Ross Supergroup. They were deposited c. 1000–950 Ma within a foreland basin to the Grenville Orogen and, collectively, are in Megasequence 1. Some of these units record Renlandian orogenesis at c. 960-920 Ma. The newly named Loch Ness Supergroup consists of the Glenfinnan, Loch Eil and Badenoch groups of the Scottish mainland, deposited c. 900–870 Ma and are assigned to Megasequence 2. These units record Knoydartian orogenesis c. 820-725 Ma. The regionally extensive Dalradian Supergroup belongs to Megasequence 3; it was deposited c. <725-500 Ma and records the opening of the Iapetus Ocean, ultimately leading to deposition of the passive margin Cambrian-Ordovician Ardvreck and Durness groups. |
format |
Article in Journal/Newspaper |
author |
Krabbendam, Maarten Strachan, Rob Prave, Tony |
spellingShingle |
Krabbendam, Maarten Strachan, Rob Prave, Tony A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
author_facet |
Krabbendam, Maarten Strachan, Rob Prave, Tony |
author_sort |
Krabbendam, Maarten |
title |
A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
title_short |
A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
title_full |
A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
title_fullStr |
A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
title_full_unstemmed |
A new stratigraphic framework for the early Neoproterozoic successions of Scotland |
title_sort |
new stratigraphic framework for the early neoproterozoic successions of scotland |
publisher |
Geological Society of London |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/531117/ https://nora.nerc.ac.uk/id/eprint/531117/1/jgs2021-054.pdf https://doi.org/10.1144/jgs2021-054 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/531117/1/jgs2021-054.pdf Krabbendam, Maarten; Strachan, Rob; Prave, Tony. 2021 A new stratigraphic framework for the early Neoproterozoic successions of Scotland. Journal of the Geological Society, 179 (2), jgs2021-054. https://doi.org/10.1144/jgs2021-054 <https://doi.org/10.1144/jgs2021-054> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1144/jgs2021-054 |
container_title |
Journal of the Geological Society |
container_volume |
179 |
container_issue |
2 |
container_start_page |
jgs2021-054 |
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1766132288060391424 |