Stratigraphy, palaeomagnetism and age of volcanics in the upper regions of Pjórsárdalur valley, central southern Iceland

Leó Kristjánsson*, Robert A. Duncan, Ágúst Gudmundsson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The 'Hreppar Formation' of southern Iceland is a succession mostly composed of basalt lavas and clastic material, with a slight anticlinal structure. It may represent a crustal fragment left in place by eastwards movement of the active spreading zone during the past 2-3 Ma. Evidence of several cycles of alternating glacial-interglacial conditions is seen in this succession. The first systematic stratigraphic study within the succession which is combined with K-Ar age determinations and laboratory palaeomagnetic measurements on oriented cores has yielded encouraging results. The age determinations confirm earlier estimates by Icelandic geologists on the age range spanned by the Hreppar succession. Units from the Jaramillo geomagnetic subchron are present in its upper part, and at least one polarity reversal event in the lower Matuyama chron is also recorded.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalBoreas
Volume27
Issue number1
DOIs
Publication statusPublished - 1998

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