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Journal Article

Palaeomagnetic correlation of the Upper Triassic of Somerset, England, with continental Europe and eastern North America

J. C. BRIDEN, B. A. DANIELS
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 317–326.
DOI: https://doi.org/10.1144/gsjgs.156.2.0317
... is correlated with magnetozones E15 to E17 in the Newark Basin, New Jersey, further supporting the inferred Norian age and tentatively placing it in the mid-Norian. Correlations with the northern North Sea and the Alps are also suggested. Results from Doniford Bay, where tectonic dips are steeper but which...
View PDF for article title, Palaeomagnetic correlation of the Upper Triassic of Somerset, England, with continental Europe and eastern North America
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Journal Article

Proliferation of Oberhauserellidae During the Recovery Following the Late Triassic Extinction: Paleoecological Implications

Marie-Emilie Clémence, Malcolm B. Hart
Published: 01 November 2013
Journal of Paleontology (2013) 87 (6): 1004–1015.
DOI: https://doi.org/10.1666/13-021
...Marie-Emilie Clémence; Malcolm B. Hart A bstract A paleoecological study of benthic foraminifera through the lower Hettangian in the Doniford Bay section (west Somerset, U.K.) is presented. The sudden and brief appearance of Oberhauserellidae in the aftermath of the Late Triassic extinction...
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View PDF for article title, Proliferation of Oberhauserellidae During the Recovery Following the Late Triassic Extinction: Paleoecological Implications
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Foraminiferal range chart with the total abundance of benthic foraminifera (×1000 specimens per gram of sediment) in the lower Hettangian, in the Doniford Bay section.

Foraminiferal range chart with the total abundance of benthic foraminifera ...

Published: 01 November 2013
Figure 3 Foraminiferal range chart with the total abundance of benthic foraminifera (×1000 specimens per gram of sediment) in the lower Hettangian, in the Doniford Bay section.
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The frequency of occurrence (FO) on the dominant (>50%) and other common...

Published: 01 November 2013
Table 1 The frequency of occurrence (FO) on the dominant (>50%) and other common (>25%) foraminiferal species in the Doniford Bay sediments. The FO is the ratio between the number of samples in which the species occurred and the total number of samples analyzed.
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1, rarefaction curves for the lower Hettangian illustrating expected species diversity versus number of specimens collected in the Doniford Bay section; 2, the Simpson index of diversity ranges from 0 (one taxon dominates the community completely) to 1 (all taxa are equally present) and can be considered a measure of evenness. Simpson index scores were plotted against the stratigraphic log.

1 , rarefaction curves for the lower Hettangian illustrating expected speci...

Published: 01 November 2013
Figure 5 1 , rarefaction curves for the lower Hettangian illustrating expected species diversity versus number of specimens collected in the Doniford Bay section; 2 , the Simpson index of diversity ranges from 0 (one taxon dominates the community completely) to 1 (all taxa are equally present
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Ordination of square-root transformed abundance data of benthic foraminiferal assemblages in 100 sediment samples collected in the Doniford Bay section, using non-metric Multidimentsional scaling (nMDS). Group 1: Eoguttulina liassica, Pseudonodosaria simpsonensi, Prodentalina pseudocommunis, Frondicularia brizaeformis, Nodosaria mentensis, Paralingulina tenera tenera, Ammodiscus sp., Paralingulina tenera collenoti, and Prodentalina tenuistriata; Group 2: Oberhauserella sp. cf. Oberhauserella alta, Oberhauserella parviforamen, Oberhauserella quadrilobata, and Reinholdella sp.; Group 3: Paralingulina tenera praepulpa and Astacolus speciosus.

Ordination of square-root transformed abundance data of benthic foraminifer...

Published: 01 November 2013
Figure 4 Ordination of square-root transformed abundance data of benthic foraminiferal assemblages in 100 sediment samples collected in the Doniford Bay section, using non-metric Multidimentsional scaling (nMDS). Group 1: Eoguttulina liassica , Pseudonodosaria simpsonensi , Prodentalina
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Paleogeographic map of northwestern Europe at Triassic-Jurassic transition. 1—Stenlille (Danish Basin), 2—St Audrie's Bay and Doniford (UK); CAMP—Central Atlantic Magmatic Province.

Paleogeographic map of northwestern Europe at Triassic-Jurassic transition....

Published: 01 June 2012
Figure 1. Paleogeographic map of northwestern Europe at Triassic-Jurassic transition. 1—Stenlille (Danish Basin), 2—St Audrie's Bay and Doniford (UK); CAMP—Central Atlantic Magmatic Province.
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Correlation of Corg isotope records and biotic events between Stenlille (Danish Basin; this paper) and St. Audrie's Bay (UK; Bonis et al., 2010; Mander et al., 2008) and Doniford (UK; Clémence et al., 2010). Ammonite events correlate St. Audrie's Bay and Doniford. First occurrence (FO) of Cerebropollenites thiergartii (marked D) ∼3 m below FO of ammonite Psiloceras planorbis at St. Audrie's Bay (Bonis et al., 2010) probably does not represent its FO datum, as it initially tends to be very rare even in terrestrial sections. FO of C. thiergartii just prior to Neg-II at Stenlille indicates location of Triassic-Jurassic boundary within Langport Member (Lilstock Formation). Rhaetian spore and/or pollen taxa include Limbosporites lundbladiae, Lunatisporites rhaeticus, Rhaetipollis germanicus, and Semiretisporis gothae. LO—last occurrence; LCO—last common or consistent occurrence; FCO—first common or consistent occurrence; MFS—maximum flooding surface; VPDB—Vienna Peedee belemnite; B.A. Fm—Blue Anchor Formation; siltst.—siltstone; clay/siltstone—clay and siltstone.

Correlation of C org isotope records and biotic events between Stenlille (...

Published: 01 June 2012
Figure 3. Correlation of C org isotope records and biotic events between Stenlille (Danish Basin; this paper) and St. Audrie's Bay (UK; Bonis et al., 2010 ; Mander et al., 2008 ) and Doniford (UK; Clémence et al., 2010 ). Ammonite events correlate St. Audrie's Bay and Doniford. First
Journal Article

A new ammonite from the Penarth Group, South Wales and the base of the Jurassic System in SW Britain

Peter Hodges
Published: 16 October 2020
Geological Magazine (2021) 158 (6): 1109–1114.
DOI: https://doi.org/10.1017/S0016756820001107
... 01 2020 12 09 2020 15 09 2020 © The Author(s), 2020. Published by Cambridge University Press 2020 The Author(s) Lavernock Point tilmanni Chronozone Neophyllites The earliest ammonite species recorded in England was P . cf. erugatum from Doniford Bay, Somerset...
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View PDF for article title, A new ammonite from the Penarth Group, South Wales and the base of the Jurassic System in SW Britain
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Journal Article

No causal link between terrestrial ecosystem change and methane release during the end-Triassic mass extinction

Sofie Lindström, Bas van de Schootbrugge, Karen Dybkjær, Gunver Krarup Pedersen, Jens Fiebig, Lars Henrik Nielsen, Sylvain Richoz
Journal: Geology
Published: 01 June 2012
Geology (2012) 40 (6): 531–534.
DOI: https://doi.org/10.1130/G32928.1
...Figure 1. Paleogeographic map of northwestern Europe at Triassic-Jurassic transition. 1—Stenlille (Danish Basin), 2—St Audrie's Bay and Doniford (UK); CAMP—Central Atlantic Magmatic Province. ...
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Journal Article

The use of dating techniques to constrain the age of fault activity: a case history from north Somerset, United Kingdom

J. C. Gutmanis, E. A Hailwood, R. H. Maddock, C. Vita-Finzi
Published: 01 November 1991
Quarterly Journal of Engineering Geology and Hydrogeology (1991) 24 (4): 363–374.
DOI: https://doi.org/10.1144/GSL.QJEG.1991.024.04.04
.... Radiometric (uranium series, 14 C) and palaeomagnetic dating techniques were applied to calcite from vein systems which cut the Hinkley Point Fault and 14 C dating was applied to bone material from undeformed Quaternary gravel deposits overlying faults in Liassic bedrock at Helwell Bay. Detailed field mapping...
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Journal Article

Two-pronged kill mechanism at the end-Triassic mass extinction

Calum P. Fox, Jessica H. Whiteside, Paul E. Olsen, Xingqian Cui, Roger E. Summons, Erdem Idiz, Kliti Grice
Journal: Geology
Published: 05 January 2022
Geology (2022) 50 (4): 448–453.
DOI: https://doi.org/10.1130/G49560.1
.... 61 , p. 1259 – 1270 , https://doi.org/10.1002/lno.10289 . Warrington , G. , Cope , J.C.W. , and Ivimey-Cook , H.C. , 2008 , The St Audrie's Bay–Doniford Bay section, Somerset, England: Updated proposal for a candidate global stratotype section and point for the base...
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Journal Article

Evidence of a biodiversity crisis documented on a peritidal carbonate succession from western Tethys (Sicily): new data on the End Triassic Mass Extinction

Simona Todaro, Manuel Rigo, Lydia Tackett, Pietro Di Stefano
Published: 01 February 2023
Italian Journal of Geosciences (2023) 142 (1): 122–130.
DOI: https://doi.org/10.3301/IJG.2023.04
... in Hungary ( Pálfy et al., 2007 ) and Doniford in England ( Clémence et al., 2010 ). The correlation between high rates of CO 2 and warming trends support synchronicity between climate warming and the ETE ( Ruhl et al., 2011 ). As demonstrated in lab experiments, ocean acidification (CO 2 -driven) can...
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Journal Article

Combined sea-level and climate controls on limestone formation, hiatuses and ammonite preservation in the Blue Lias Formation, South Britain (uppermost Triassic – Lower Jurassic)

GRAHAM P. WEEDON, HUGH C. JENKYNS, KEVIN N. PAGE
Published: 30 January 2017
Geological Magazine (2018) 155 (5): 1117–1149.
DOI: https://doi.org/10.1017/S001675681600128X
..., based on new sampling by K.N.P. on coastal sections ( Fig. 1a ) in East Devon (Lyme Regis), West Somerset (Doniford, St Audries Bay, East Quantocks Head to Kilve) and South Glamorgan, South Wales (St Mary’s Well Bay, Lavernock). The biohorizon boundaries, where constrained to within a few centimetres...
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View PDF for article title, Combined sea-level and climate controls on limestone formation, hiatuses and ammonite preservation in the Blue Lias Formation, South Britain (uppermost Triassic – Lower Jurassic)
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Journal Article

Milankovitch-scale palynological turnover across the Triassic–Jurassic transition at St. Audrie's Bay, SW UK

Nina R. Bonis, Micha Ruhl, Wolfram M. Kürschner
Published: 01 September 2010
Journal of the Geological Society (2010) 167 (5): 877–888.
DOI: https://doi.org/10.1144/0016-76492009-141
.... Ivimey-Cook H.C. St Audries Bay, Somerset, England—a candidate Global Stratotype Section and Point for the base of the Jurassic system Geological Magazine 1994 131 191 200 Warrington G. Cope J.C.W. Ivimey-Cook H.C. The St Audrie's Bay–Doniford Bay section, Somerset, England...
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View PDF for article title, Milankovitch-scale palynological turnover across the Triassic–Jurassic transition at St. Audrie&#x27;s <span class="search-highlight">Bay</span>, SW UK
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Journal Article

MICROFACIES OF THE COTHAM MARBLE: A TUBESTONE CARBONATE MICROBIALITE FROM THE UPPER TRIASSIC, SOUTHWESTERN U.K

YADIRA IBARRA, FRANK A. CORSETTI, SARAH E. GREENE, DAVID J. BOTTJER
Journal: PALAIOS
Published: 01 January 2014
PALAIOS (2014) 29 (1): 1–15.
DOI: https://doi.org/10.2110/palo.2013.046
... extinction: Science , v. 292 , p. 1148 – 1151 . Warrington G. Cope J.C.W. Ivimey-Cook H.C. 2008 , The St Audrie's Bay–Doniford Bay section...
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View PDF for article title, MICROFACIES OF THE COTHAM MARBLE: A TUBESTONE CARBONATE MICROBIALITE FROM THE UPPER TRIASSIC, SOUTHWESTERN U.K
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Journal Article

Vegetation history, diversity patterns, and climate change across the Triassic/Jurassic boundary

Nina R. Bonis, Wolfram M. Kürschner
Journal: Paleobiology
Published: 01 March 2012
Paleobiology (2012) 38 (2): 240–264.
DOI: https://doi.org/10.1666/09071.1
.... Audrie's Bay–Doniford Bay section, Somerset, England: updated proposal for a candidate Global Stratotype Section and Point for the base of the Hettangian Stage, and of the Jurassic System . International Subcommission on Jurassic Stratigraphy Newsletter 35 : 2 – 66...
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View PDF for article title, Vegetation history, diversity patterns, and climate change across the Triassic/Jurassic boundary
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Journal Article

Palynofloral patterns of terrestrial ecosystem change during the end-Triassic event – a review

SOFIE LINDSTRÖM
Published: 01 September 2015
Geological Magazine (2016) 153 (2): 223–251.
DOI: https://doi.org/10.1017/S0016756815000552
...SOFIE LINDSTRÖM Abstract A review of the palynofloral succession at the well-documented Triassic–Jurassic boundary sites – Kuhjoch (Austria), St Audrie's Bay (UK), Stenlille (Denmark), Astartekløft (Greenland), Sverdrup Basin (Arctic Canada), Northern Carnarvon Basin (Western Australia), Southeast...
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Journal Article

Modelling the impact of pulsed CAMP volcanism on p CO 2 and δ 13 C across the Triassic–Jurassic transition

AVIV BACHAN, JONATHAN L. PAYNE
Published: 08 June 2015
Geological Magazine (2016) 153 (2): 252–270.
DOI: https://doi.org/10.1017/S0016756815000126
.... , Beaumont V. & Page K. N. 2010 . Early Hettangian benthic–planktonic coupling at Doniford (SW England): palaeoenvironmental implications for the aftermath of the end-Triassic crisis...
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View PDF for article title, Modelling the impact of pulsed CAMP volcanism on p CO 2 and δ 13 C across the Triassic–Jurassic transition
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Journal Article

Bivalve body-size distribution through the Late Triassic mass extinction event

L. Felipe Opazo, Richard J. Twitchett
Journal: Paleobiology
Published: 01 August 2022
Paleobiology (2022) 48 (3): 420–445.
DOI: https://doi.org/10.1017/pab.2021.38
.... S. , and R. J. Twitchett . 2009 . Extinction, dwarfing and the Lilliput effect . Palaeogeography, Palaeoclimatology, Palaeoecology 284 : 1 – 3 . Warrington , G. , J.C.W. Cope , and H. C. Ivimey-Cook . 2008 . The St Audrie's Bay–Doniford Bay section, Somerset...
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