Rit (Vísindafélag Íslendinga) - 01.06.1967, Side 114

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Scandinavia may be an order of magnitude larger than what
is “normal” for the earth as a whole. If this is true, the
value for Iceland — and the neighbouring parts of the Ridge
— would be about normal. This seems in keeping with the
result that heat flow is practically normal on the Ridge ex-
cept for a very narrow median zone. On the other hand,
determinations of subcrustal viscosity are still far too few
to render the “normal” value.
REFERENCES
Broecker, W. S., 1966: Glacial rebound and the deformation of shorelines
of proglacial lakes. JGR, 71, 4777—4783.
Einarsson, Trausti, 1953: Depression of the earth’s crust under glacier load.
Various aspects. Jökull, 3. ár, 2—5.
— 1966: Late and post-glacial rise in Iceland and sub-crustal viscosity.
Jökull, 16. ár, 157-166.
DISCUSSION
S. Thorarinsson: It seems strange that Scandinavia has an
abnormally high viscosity; it should be a typical marginal
area of continents.
Trausti Einarsson: It has been suggested that the rise of
Scandinavia may be influenced by some other processes than
viscous flow, e.g. recrystallization, and that for this reason
the inferred viscosity comes out abnormally high.
Thorleifur Einarsson: Which material is used to find a
rise curve for Iceland?
Trausti Einarsson: This is fully explained in the quoted
paper now in print. I construct a theoretical rise-curve and
adjust it so that it fits the new data for Reytjavík and other
localities in Iceland. Comparison of such a rise-curve with a
corresponding one for Scandinavia, and taking the radii of
the two depressions into account, gives the relative viscosity.