Leó Kristjánsson and Haukur Jóhannesson
Stratigraphy and paleomagnetism of the lava pile south of Ísafjarðardjúp, NW- Iceland. Jökull 44, 3 - 16, 1996.
A composite 2.6 km stratigraphic section has been constructed from 12 well-exposed lava profiles in the fjords on the south side of Ísafjarðardjúp, in the Vestfirðir peninsula of NW-Iceland. Its age is around 13 Ma. Oriented cores for paleomagnetic measurements were collected from 307 lava sites, 225 of them in the composite section. The lavas carry a stable primary remanence, and ten or more reversals of geomagnetic polarity are recorded in the composite section. There is also evidence for extended excursions (periods of instability) of the geomagnetic field, with some 15 lavas in the section being erupted during one of these.
The paleomagnetic polarites are used along with geological information for
correlation with the composite section of McDougall et al. (1984) along the
western side of the Vestfirðir peninsula. Sediments correlated with the
Brjánslækur sedimentary horizon occur near the top of the Ísafjarðardjúp
section. We suggest that the two sections mapped by McDougall et al. on the
western and eastern sides of the peninsula fail to overlap, possibly by over
1 km of lava thickness.
I. McDougall , L. Kristjánsson and K. Sæmundsson: Magnetostratigraphy and geochronology of Northwest Iceland. Journal of Geophysical Research 89, 7029 - 7060, 1984.