Jökull - 01.12.1991, Page 60

Cumulative
thickness
in metres
Magnetic polarity of composite sections
Mosfellssveit
(this work)
800 Esja
Kristjánsson et al. 1980
I
i
uc
UB*
▲
I
UF
' UG
UE
GB
u
A Glacial horizon (tillite and/or hyaloclastite)
■ Conglomerate bed (probably of glaciofluvial origin)
Fig. 5. Polarity column of the mapped
section and proposed correlations
with the uppermost part of the Esja
section of Kristjánsson et al. (1980).
Dark is normal magnetization. Glacial
horizons and glaciofluvial
conglomerate beds are also indicated.
- Samsett jarðlagasúla , er sýnir
þykktir rétt og öfugt segulmagnaðra
myndana í Mosfellssveit.
Kuldaskeiðslög og tengingar við Esju
einnig sýnd.
found in the fields towards Úlfarsfell. The top 4—5
units are not included in Fig. 3: flow 29 is just below
the main road and 30, 30X are near the old geother-
mal pipeline.
UG : Lágafell hill. Starts at the Hamraborg residence,
lavas 1-5 were sampled below the main road and the
others on the westem slope of the Lágafell hill.
UK : Kaldakvísl river. Starts at the mins of a small
hydroelectric power station and continues upstream.
UK 7 was collected underneath the bridge and the
remainder in the south river bank immediately east of
the bridge. Note that the presence of a fault makes
flow 7 the oldest one in this profile. There are no
exposures immediately above UK, but we attempted
sampling outcrops of four lavas just east of the
Highway 36 turnoff and two in the north river bank;
their paleomagnetic directions are mostly normal but
the stratigraphy is irregular and some of our results
were of poor consistency, so detailed data from these
are not included in Table 1.
58 JÖKULL, No. 41, 1991