42 (Norway : official publication for the Paris exhibition 1900)

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have in some eases been found even within the gabbro in schists
formed of the gabbro by compression along shearing planes.
Consequently we are induced to regard these ores as having been formed
in some volcanic way, probably as veins, which have penetrated
the gabbro and adjacent tuffs; in the latter case they have, as a
rule, followed the bedding of the strata. The lenticular form is
due to subsequent compression.

In the farthest north of Norway, to the east of the North
Cape, is a sandstone region which is not unlike the Sparagmite
region of Southern Norway, and probably may be contemporaneous
with it. This formation has of late become of additional interest,
as it has been found to contain evidence of an Ice Age of very
ancient date (Cambro-Silurian?). Within the sandstone are morainic
masses which contain ice-worn pebbles and rest upon surfaces
which are glacially striated.

JURASSIC.

Jurassic sandstone with a few seams of coal are found on a
few square kilometers on Andøen island at 69° N.

QUATERNARY DEPOSITS.

The phenomena of the Ice Age are in Norway the same as
everywhere else: rounding, polishing and striation of the rocks
and the occasional formation of «giants’ kettles» and other effects
of running water under the glaciers, deposition of different kinds
of moraines and of gravel and sandplains in front of the ice.
Eskers and drumlins of characteristic form are rather scarce. All
our glacial deposits belong, so far as we know, to the later stages
of the Ice Age and attain, as a rule, only a very limited
thickness. During the period of the last melting of the ice and later,
the land lay lower than at present, as is shown by the fact that
recent marine deposits, sand and clay, are found to a height of
about two hundred meters in the Kristiania and Trondhjem regions
and to less heights on other parts of the coast. The marine shells
found in the clays show a transition from a cold arctic climate
prevailing during the sedimentation of the older clays to the mild

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