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End of the Kiaman Superchron in the Permian of SW England: magnetostratigraphy of the Aylesbeare Mudstone and Exeter groups

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End of the Kiaman Superchron in the Permian of SW England : magnetostratigraphy of the Aylesbeare Mudstone and Exeter groups. / Hounslow, Mark William; McIntosh, Gregg; Edwards, Richard; Laming, Deryk; Karloukovski, Vassil Vassilev.

In: Journal of the Geological Society, Vol. 174, No. 1, 01.2017, p. 56-74.

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Hounslow, Mark William ; McIntosh, Gregg ; Edwards, Richard ; Laming, Deryk ; Karloukovski, Vassil Vassilev. / End of the Kiaman Superchron in the Permian of SW England : magnetostratigraphy of the Aylesbeare Mudstone and Exeter groups. In: Journal of the Geological Society. 2017 ; Vol. 174, No. 1. pp. 56-74.

Bibtex

@article{69036204e3134c19b90a8fc57738f6e9,
title = "End of the Kiaman Superchron in the Permian of SW England: magnetostratigraphy of the Aylesbeare Mudstone and Exeter groups",
abstract = "The chronology of Permian strata in SW England is fragmentary and largely based on radiometric dating of associated volcanic units. Magnetostratigraphy from the c. 2 km of sediments in the Exeter and Aylesbeare Mudstone groups was undertaken to define a detailed chronology, using the end of the Kiaman Superchron and the overlying reverse and normal polarity in the Middle and Upper Permian as age constraints. The palaeomagnetic directions are consistent with other European Permian palaeopoles, with data passing fold and reversal tests. The end of the Kiaman Superchron (in the Wordian) occurs in the uppermost part of the Exeter Group. The overlying Aylesbeare Mudstone Group is early Capitanian to latest Wuchiapingian in age. The Changhsingian and most of the Lower Triassic sequence is absent. Magnetostratigraphic comparison with the Southern Permian Basin shows that the Exeter and Aylesbeare Mudstone groups are closely comparable in age with the Havel and Elbe Subgroups of the Rotliegend II succession. The Altmark unconformities in these successions appear similar in age to the sequence boundaries in SW England, indicating that both may be climate controlled. Clasts in the Exeter Group, from unroofing of the Dartmoor Granite, first occurred at a minimum of c. 8 myr after formation of the granite.",
author = "Hounslow, {Mark William} and Gregg McIntosh and Richard Edwards and Deryk Laming and Karloukovski, {Vassil Vassilev}",
year = "2017",
month = jan,
doi = "10.1144/jgs2015-141",
language = "English",
volume = "174",
pages = "56--74",
journal = "Journal of the Geological Society",
issn = "0016-7649",
publisher = "Geological Society of London",
number = "1",

}

RIS

TY - JOUR

T1 - End of the Kiaman Superchron in the Permian of SW England

T2 - magnetostratigraphy of the Aylesbeare Mudstone and Exeter groups

AU - Hounslow, Mark William

AU - McIntosh, Gregg

AU - Edwards, Richard

AU - Laming, Deryk

AU - Karloukovski, Vassil Vassilev

PY - 2017/1

Y1 - 2017/1

N2 - The chronology of Permian strata in SW England is fragmentary and largely based on radiometric dating of associated volcanic units. Magnetostratigraphy from the c. 2 km of sediments in the Exeter and Aylesbeare Mudstone groups was undertaken to define a detailed chronology, using the end of the Kiaman Superchron and the overlying reverse and normal polarity in the Middle and Upper Permian as age constraints. The palaeomagnetic directions are consistent with other European Permian palaeopoles, with data passing fold and reversal tests. The end of the Kiaman Superchron (in the Wordian) occurs in the uppermost part of the Exeter Group. The overlying Aylesbeare Mudstone Group is early Capitanian to latest Wuchiapingian in age. The Changhsingian and most of the Lower Triassic sequence is absent. Magnetostratigraphic comparison with the Southern Permian Basin shows that the Exeter and Aylesbeare Mudstone groups are closely comparable in age with the Havel and Elbe Subgroups of the Rotliegend II succession. The Altmark unconformities in these successions appear similar in age to the sequence boundaries in SW England, indicating that both may be climate controlled. Clasts in the Exeter Group, from unroofing of the Dartmoor Granite, first occurred at a minimum of c. 8 myr after formation of the granite.

AB - The chronology of Permian strata in SW England is fragmentary and largely based on radiometric dating of associated volcanic units. Magnetostratigraphy from the c. 2 km of sediments in the Exeter and Aylesbeare Mudstone groups was undertaken to define a detailed chronology, using the end of the Kiaman Superchron and the overlying reverse and normal polarity in the Middle and Upper Permian as age constraints. The palaeomagnetic directions are consistent with other European Permian palaeopoles, with data passing fold and reversal tests. The end of the Kiaman Superchron (in the Wordian) occurs in the uppermost part of the Exeter Group. The overlying Aylesbeare Mudstone Group is early Capitanian to latest Wuchiapingian in age. The Changhsingian and most of the Lower Triassic sequence is absent. Magnetostratigraphic comparison with the Southern Permian Basin shows that the Exeter and Aylesbeare Mudstone groups are closely comparable in age with the Havel and Elbe Subgroups of the Rotliegend II succession. The Altmark unconformities in these successions appear similar in age to the sequence boundaries in SW England, indicating that both may be climate controlled. Clasts in the Exeter Group, from unroofing of the Dartmoor Granite, first occurred at a minimum of c. 8 myr after formation of the granite.

U2 - 10.1144/jgs2015-141

DO - 10.1144/jgs2015-141

M3 - Journal article

VL - 174

SP - 56

EP - 74

JO - Journal of the Geological Society

JF - Journal of the Geological Society

SN - 0016-7649

IS - 1

ER -