Rit (Vísindafélag Íslendinga) - 01.07.1962, Blaðsíða 100

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of r L consisting of thin lava tongues, intercalated with a por-
ridge of glass fragments. This is covered with a dark grey
conglomerate, possibly corresponding to the “moraine” above
Framnes, but it is not possible to see whether it belongs to
the section or has been deposited on the slope. Now comes
a series of reverse lavas, up to 115 m. These are quite ordi-
nary basalt lavas, and to judge from the scarcity of pores they
have probably flowed for a considerable distance. Next comes
primary breccia which at 140—150 m is covered by a 4—5 m
thick conglomerate. It is mostly of brown colour but the top-
most 10—30 cm are grey and probably of glacial origin. It is
likely that this conglomerate corresponds to the “moraine” mL
at Framnes.
Above this is a reverse hasalt mass which higher changes
into a breccia with some matrix of brown glassy flour. This
is a thick mass, corresponding to t1; that reaches 270 m, where
it is cut hy a horizontal erosion surface. On this rests a thin
(30 cm) conglomerate which is covered by a primary, very
coarse breccia (klepraberg) of normal polarization, n2. This
breccia is in tum cut by an erosion surface that dips north-
wards, and on this rests a hard grey undoubted moraine,
sandstone, and secondary breccia, with a total thickness of
15-—20 m. The floor is clearly glacially striated (S 15°W).
On this sediment rests a thick mass of columnar and kubba-
berg stmcture at the base, but turning into a coarser and finer
breccia higher up. This thick mass, which is of reverse po-
larity, r2, forms the surface of the eastem part of the moun-
tain. This uppermost group must on account of its polarity
be reckoned as Lower Pleistocene or older. Because of the
very clear evidence of glaciation below, it should most rea-
sonably be considered as Pleistocene, possibly the first major
Pleistocene glaciation, i.e. corresponding to Giinz. Below this
we have an eroded normal group which according to present
knowledge of the history of geomagnetism should be consi-
dered as Pliocene, and this rests on an extended horizontal
erosion plane which we have then good reasons to consider