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

Leo Kristjansson; Agust Gudmundsson; Björn S. Hardarson

doi:10.1007/s00531-004-0409-4

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

Leo Kristjansson^*, Agust Gudmundsson, Björn S. Hardarson

^*Corresponding author for this work

Science Institute

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	582-595
Number of pages	14
Journal	International Journal of Earth Sciences
Volume	93
Issue number	4
DOIs	https://doi.org/10.1007/s00531-004-0409-4
Publication status	Published - Sept 2004

Bibliographical note

Funding Information:
Acknowledgements Several people assisted in the mapping, sampling, and paleomagnetic measurements reported in this paper. They include Haukur Johannesson, Thordis Högnadottir, Sigurdur Jonsson, Stuart Hartley, Vala Hjörleifsdottir, Eydis S. Eiriksdottir, Dadi Thorbjörnsson, Matthildur Stefansdottir, and Eyjolfur Mag-nusson. We particularly wish to thank Geirfinnur Jonsson for his painstaking computer work with the diagrams and tables. Comments by J. G. Fitton and B. Upton as well as by the Journal’s two anonymous reviewers resulted in considerable improvement of the manuscript. This study was in part supported by the Science Fund of the National Research Council of Iceland, the University of Iceland Research Fund, and by NERC (GS/02/673).

Other keywords

Basalt lavas
Iceland
Late Miocene
Paleomagnetism
Stratigraphy

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10.1007/s00531-004-0409-4

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title = "Stratigraphy and paleomagnetism of a 2.9-km composite lava section in Eyjafj{\"o}rdur, Northern Iceland: A reconnaissance study",

abstract = "Eight mountainside profiles in lava flows south of the fjord Eyjafj{\"o}rdur, 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.",

keywords = "Basalt lavas, Iceland, Late Miocene, Paleomagnetism, Stratigraphy",

author = "Leo Kristjansson and Agust Gudmundsson and Hardarson, {Bj{\"o}rn S.}",

note = "Funding Information: Acknowledgements Several people assisted in the mapping, sampling, and paleomagnetic measurements reported in this paper. They include Haukur Johannesson, Thordis H{\"o}gnadottir, Sigurdur Jonsson, Stuart Hartley, Vala Hj{\"o}rleifsdottir, Eydis S. Eiriksdottir, Dadi Thorbj{\"o}rnsson, Matthildur Stefansdottir, and Eyjolfur Mag-nusson. We particularly wish to thank Geirfinnur Jonsson for his painstaking computer work with the diagrams and tables. Comments by J. G. Fitton and B. Upton as well as by the Journal{\textquoteright}s two anonymous reviewers resulted in considerable improvement of the manuscript. This study was in part supported by the Science Fund of the National Research Council of Iceland, the University of Iceland Research Fund, and by NERC (GS/02/673).",

year = "2004",

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N2 - 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.

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

Abstract

Bibliographical note

Other keywords

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