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ÁGRIP
JARÐHITASVÆÐIÐ í GRÍMSVÖTNUM
Helgi Björnsson, Raunvísindastofnun
Hrefna Kristmannsdóttir, Orkustofnun.
Þótt jarðhitasvæðið í Grímsvötnum sé eitt
stærsta (ef ekki stærsta) jarðhitasvæði á íslandi,
sjást þar ekki mikil bein ummerki um jarðhita
eins og við eigum að venjast á öðrum jarðhita-
svæðum. Jarðhitasvæðið er að mestu leyti hulið
jökli. Ummerki jarðhitans eru því óvenjuleg.
Öldum saman hefur hann brætt ís og myndað
mikla lægð inni á miðjum Vatnajökli, Gríms-
vatnalægðina. Að sunnan afmarkast hún af
Grímsfjalli, 300 m háu þverhníptu stáli, að vestan
48 JÖKULL 34. ÁR