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Application of palynological data to the chronology of the Palaeogene lava fields of the British Province: implications for magmatic stratigraphy

Bell, B.R., and Jolley, D.W. (1997) Application of palynological data to the chronology of the Palaeogene lava fields of the British Province: implications for magmatic stratigraphy. Journal of the Geological Society, 154 (4). pp. 701-708. ISSN 0016-7649

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Abstract

New high-precision ages, determined from palynomorph assemblages within intercalated sedimentary deposits, are presented for the Palaeogene lava fields (Skye, Mull and Antrim) of the British Province. These data reveal very rapid averaged eruption rates (1 m/200 yr) and the non-synchronous formation of the lava fields. Eruption of the volumetrically dominant transitional to mildly alkaline lavas of the Skye (58.25-58.0 Ma) and Mull (post 55 Ma) lava fields is separated by the eruption of the MORB-like Preshal More flows of olivine tholeiite found at the top of the preserved sequence on Skye and at the base of the Mull Lava Field. The Lower Formation of the Antrim Lava Field correlates with the Skye Lava Field and the Upper Formation correlates with the Preshal More flows. The new ages indicate that the eruption of the Preshal More flows was synchronous with the main ocean floor spreading event which occurred 500 km to the NW, at c. 55 Ma, during Chron 24r. A combined thinspot and channelized plume model may best explain the temporal and spatial distributions of the lava fields and associated subvolcanic complexes of the British Province.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Bell, Dr Brian
Authors: Bell, B.R., and Jolley, D.W.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Journal of the Geological Society
Publisher:Geological Society of London
ISSN:0016-7649
ISSN (Online):2041-479X
Copyright Holders:Copyright © 1997 The Geological Society of London
First Published:First published in Journal of the Geological Society 154(4):701 - 708
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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