Náttúrufræðingurinn - 2012, Blaðsíða 124

Náttúrufræðingurinn
124
Þakkir
Við þökkum Anette T. Meier og Þórdísi Högnadóttur fyrir hjálp við gerð
mynda og tveimur yfirlesurum handritsins ýmsar gagnlegar ábendingar.
Heimildir
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eruption) provides an indication of the
thickness of the glaciers during their
formation. These water levels provide
some constraints on the thickness of the
glacier at the time of formation and in-
dicate that the tuyas were formed
within a glacier that was less than 1 km
thick and therefore considerably smaller
than e.g. the ice sheet covering Iceland
at the time of the last glacial maximum.
This may be explained by the scarcity or
absence of tuya producing eruptions at
the time of the last glacial maximum.
This is consistent with models of the ef-
fects of loading and unloading of vax-
ing and vaning ice sheets on decom-
pressional melting in the mantle
underneath Iceland.