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How was the Iapetus Ocean infected with subduction?

John W. F. Waldron, David I. Schofield, J. Brendan Murphy and Chris W. Thomas
How was the Iapetus Ocean infected with subduction?
Geology (Boulder) (October 2014) 42 (12): 1095-1098

Abstract

Because subduction in the Iapetus Ocean began only approximately 35 m.y. after the end of rifting, spontaneous foundering of mature passive margins is an unlikely subduction-initiation mechanism. Subduction is more likely to have entered the Iapetus from the boundary with the external paleo-Pacific, similar to the incursion of the Scotia, Caribbean, and Gibraltar arcs into the modern Atlantic. The subduction zone probably became sinuous, entraining fragments of the Gondwanan margin along its complex sinistral southern boundary where oblique collision caused Monian-Penobscottian deformation. Following Taconian-Grampian collision of part of the subduction system with Laurentia, remaining parts of the Iapetus were progressively infected with subduction, leading to Silurian closure.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 42
Serial Issue: 12
Title: How was the Iapetus Ocean infected with subduction?
Affiliation: University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB, Canada
Pages: 1095-1098
Published: 20141024
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 56
Accession Number: 2014-102349
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch map
Secondary Affiliation: British Geological Survey, GBR, United KingdomSt. Francis Xavier University, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201451
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