Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (17)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wignall, P. B.
Right arrow Articles by Twitchett, R. J.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 2002; v. 159; issue.6; p. 691-703;
DOI: 10.1144/0016-764900-120
© 2002 Geological Society of London

Original Article

Permian–Triassic sedimentology of Jameson Land, East Greenland: incised submarine channels in an anoxic basin

Paul B. Wignall1 & Richard J. Twitchett2

1 1School of Earth Sciences, University of Leeds, Leeds LS2 9JT, UK (e-mail: p.wignall@earth.leeds.ac.uk)
2 2Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK

The presence of deeply erosive, conglomeratic sandstone-filled channels around the Permian–Triassic (P–Tr) boundary in East Greenland has been widely cited as evidence for a major, late Permian eustatic lowstand. Facies analysis of such channels and their associated strata in fact suggests that they record part of an intrinsic style of basinal deposition (that persisted into Early Triassic time). Their origin can be explained without the need to invoke eustatic sea-level fall. Active faulting and hinterland elevation is envisaged to have generated powerful sediment-gravity flows that were capable of submarine erosion of fine-grained, unconsolidated strata. Stacked, turbidite-sandstone-filled lenses also occur beneath fan delta sandbodies and probably record infill of channels or chutes cut into the subaqueous slopes of such deltas. Shale successions developed between the incised channel locations record complete P–Tr transitions in which a rapid onset of anoxic deposition is seen in latest Permian time. This is the local manifestation of a global anoxic event. Unusual aspects of the Lower Triassic sequence in Greenland include the presence of well-oxygenated intervals, stromatolite bioherms and red algae.


Keywords: Permian–Triassic boundary, East Greenland, submarine channels, anoxia.




This article has been cited by other articles:


Home page
 Geological MagazineHome page
M. BJERAGER, L. SEIDLER, L. STEMMERIK, and F. SURLYK
Ammonoid stratigraphy and sedimentary evolution across the Permian-Triassic boundary in East Greenland
Geological Magazine, 2006; 143: 635 - 656.
[Abstract] [Full Text] [PDF]

Home page
 Journal of the Geological SocietyHome page
L. Seidler, L. Seidler, RonJ. Steel, L. Stemmerik, and F. Surlyk
North Atlantic marine rifting in the Early Triassic: new evidence from East Greenland
Journal of the Geological Society, 2004; 161: 583 - 592.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
R. J. Twitchett and C. G. Barras
Trace fossils in the aftermath of mass extinction events
Geological Society, London, Special Publications, 2004; 228: 397 - 418.
[Abstract] [PDF]

Home page
 PalynologyHome page
J. UTTING, A. SPINA, J. JANSONIUS, D. C. McGREGOR, and J. E.A. MARSHALL
REWORKED MIOSPORES IN THE UPPER PALEOZOIC AND LOWER TRIASSIC OF THE NORTHERN CIRCUM-POLAR AREA AND SELECTED LOCALITIES
Palynology, 2004; 28: 75 - 119.
[Abstract] [Full Text] [PDF]