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Late Ordovician–early Silurian destruction of the Iapetus Ocean: Newfoundland, British Isles and Scandinavia—a discussion

Published online by Cambridge University Press:  03 November 2011

Kevin T. Pickering ,
Michael G. Bassett  and
David J. Siveter
Kevin T. Pickering
Affiliation:
Department of Geology, University of Leicester, Leicester LE1 7RH, U.K.
Michael G. Bassett
Affiliation:
Department of Geology, National Museum of Wales, Cathays Park, Cardiff CF1 3NP, Wales, U.K.
David J. Siveter
Affiliation:
Department of Geology, University of Leicester, Leicester LE1 7RH, U.K.
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Abstract

The available data from Newfoundland, the British Isles and Scandinavia suggest that by late Ordovician–early Silurian times the ocean separating Laurentia from Eastern Avalonia and Baltica had partly closed with the consumption of intervening oceanic crust. Marine seaways, however, persisted until the middle or late Silurian. Phases of crustal transtension and transpression, predominantly under a major sinistral shear couple, occurred throughout the Silurian and early Devonian until the remnant Iapetus Ocean was completely destroyed. The most appropriate Recent plate tectonic models for Silurian sedimentation between Eastern Avalonia and Laurentia are probably the deep-marine foreland basins between Timor and the northern Australian margin, or between Taiwan and mainland China.

Keywords

Balticacrustal transpressiondeep-marine foreland basinEastern AvaloniaLaurentiasinistral sheartranstension
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 79 , Issue 4 , 1988 , pp. 361 - 382
Copyright
Copyright © Royal Society of Edinburgh 1988

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