Stratigraphy and paleomagnetism of a 2.9-km composite lava section in Eyjafjördur, Northern Iceland: a reconnaissance study

Eight mountainside profiles in lava flows south of the fjord Eyjafjördur, Northern Iceland, were sampled for paleomagnetic studies. The sampling was concurrent with pilot stratigraphic mapping of the lava sequences in these and several supplementary profiles. The eight profiles are correlated with m...

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Bibliographic Details
Published in:International journal of earth sciences : Geologische Rundschau 2004-09, Vol.93 (4), p.582
Main Authors: Kristjansson, Leo, Gudmundsson, Agust, Hardarson, Björn S
Format: Article
Language:English
Subjects:
Geology
Geomagnetic field
Lava
Lava flows
Paleomagnetism
Stratigraphy
Online Access:Get full text
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Summary:Eight mountainside profiles in lava flows south of the fjord Eyjafjördur, Northern Iceland, were sampled for paleomagnetic studies. The sampling was concurrent with pilot stratigraphic mapping of the lava sequences in these and several supplementary profiles. The eight profiles are correlated with minor overlaps so that they form a composite section of 2.9 km thickness, estimated to cover the age range between about 9 and 5 million years ago (Hardarson et al. 1999). Paleomagnetic measurements made on 319 lavas generally yield primary remanence directions of high stability and within-unit consistency. Evidence for at least 17 reversals of the geomagnetic field is seen, as well as numerous field excursions. Frequent clustering of directions in successive lavas indicates that the volcanism was episodic.[PUBLICATION ABSTRACT]
ISSN:1437-3254
1437-3262
DOI:10.1007/s00531-004-0409-4