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opposite Drobak. If the till were a ground
moraine formed without the aid of flotation, the
deep pocket of the Mjosen lake must have been
filled by it, instead of being eroded deeper as it
appears to have been.
Having just met with some interesting matter
in Professor Sars’ report on the results of the
Norwegian North Sea Expedition of 1856, I must
insert another last word bearing upon the above,
although it is already in type. The soundings of
the Sognefjord revealed a maximum depth of 3900
feet; and the other fjords running far inland are
similarly scooped into deep pools, while the sea
bottom near their mouths is shallowed by a series
of banks, which extend more or less uniformly all
around the Norwegian coast. The ordinary depth
of these bauks is from about fifty to one or two
hundred feet. Beyond this fringe of banks the
sea rapidly deepens, and reaches 12,000 feet
halfway between Norway and Iceland, and about
6000 feet between Norway and the Faroe
Islands.
The existence of such banks just where,
according to my explanation of the constitution and
termination of the ancient glaciers, there should be
a great deposit of till, supplies a suggestive
confirmation of this theory. If it shall hereafter be
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