Náttúrufræðingurinn - 1981, Side 28

often been idcntified by resisivity measure-
ments connected to geothermal exploration.
It appears as low resistivity Iayers at shallow
dephts.
Saline thermal water is coramon in bore-
holes in the lowlands of South Iceland. The
most probable origin of this salinity is from
the transgression of late glacial times. Sea-
water that infiltrated the bedrock of the
transgressed areas still pollutes the ground-
water but a slow outwash of this marine
water is taking place.
Fig. 2 shows the main areas of the saline
groundwater in Iceland. Marine salts in the
groundwater in Iceland are always accom-
panied by marinc water. No salt layers exist
in the bedrock of the country nor are there
any sedimentary layers with enriched salt
contcnt. This hypothesis leads to the con-
clusion that well water in the Vestmanna
islands, and most likely in Akranes too, is of
very high age and comparabie to thc oldest
known water in Iceland, in Húsavík and
Hafralækur in North Iceland.
HEIMILDIR
Árnason, Bragi. 1976. Groundwater Systems
in Iceland. Vísindafélag íslendinga
XLII. 236 s.
Hjartarson, Árni. 1978. Islenskt vatnafarskort
og vatnajarðfræði. Prófritgerð (4. árs
verkefni) við Háskóla Islands. 83 s.
Ingimarsson, Jón & Jónas Elíasson. 1980.
Svatsengi — Grunnatnsrannsóknir
vegna ferskvatnsöflunar fyrir varma-
orkuver. Orkustofnun, OS80021/
ROD12, 86 s. + kortamappa.
Pálmason, Guðmundur, Jens Tómasson, Jón Jóns-
son & Isleifur Jónsson. 1965. Djúpborun I
Vestmannaeyjum. Raforkumálastjóri,
Jarðhitadeild og Jarðboranir ríkisins 44 s.
Þórarinsson, Freyr. 1979. Hitaveita Akureyrar
— Rannsókn jarðhita í Eyjafirði.
Áfangaskýrsla 1978. Orkustofnun,
OS-JHD 7827 35 s.
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