Jökull - 01.01.2014, Blaðsíða 53

Magnetostratigraphy, K-AR dating and erosion history of Hafrafell, SE–Iceland
the whole of Iceland. With regard to the established
stratigraphic framework for Hafrafell, erosion sur-
faces, valley formation, timing of events, stratigraphic
correlation of magnetic chrons we now draw together
the evolution though time (0-4 Ma) of erosion and
volcanism in the area in six landscape stages (Table
3) as follows:
Stage 1. Volcanic strata in Hafrafell that predate the
Gauss chron (> ca. 3.6 Ma) consist almost entirely of
subaerially erupted lavas. We therefore conclude that
erosion was minor (<50 m) with rivers acting as the
dominant erosive agent.
Figure 9. Appearance of glaciations in Illuklettar is here depicted with stratigraphic profiles from north (left) to
south (right) extending upwards from Gilbert through Gauss to Matuyama chrons. Age and defined glacial- or
inter-glacial division is shown on the left. Explanations as for Figure 4. – Innkoma ísaldar í Illuklettum sýnd
með jarðlagasniðum frá norðri (vinstri) til suðurs (hægri) sem ná frá segulmundum Gilbert (elst) upp í gegnum
Gauss og Matuyama. Aldur og aðskilin hlýskeið/jökulskeið eru sýnd til vinstri. Skýringar eins og á 4. mynd.
JÖKULL No. 64, 2014 53