306 SECTIONAL TRANSACTIONS.—C. 
the Varangerfjord tillite, Summarily, the Moinian and Dalradian forma- 
tions would appear to be Caledonian in the wide sense, including sediments 
of Eocambrian age, and possibly still older Post-Karelian rocks. 
Prof. H. VON ECKERMANN. 
In Sweden, recent work has divided the Pre-Cambrian into five great 
groups : 
1. The Leptites, being the oldest known volcanic and sedimentary rocks, 
cut by the oldest known granites. 
2. Archzan sediments, phyllites and quartzites, proved through mapping 
in the Loos area to rest unconformably on the old leptite-granite surface. 
3. Late-Archzan, consisting of plutonic and volcanic rocks, followed by 
later sediments. 
4. Pre-Jotnian Series, also largely igneous, with their graded erosion 
products. 
5. Sub-Jotnian Series, porphyries, porphyrites and rapakivi granites, 
followed by the Jotnian red sandstones and shales. 
Each of these groups is separated from the next by an unconformity and 
well-developed conglomerates. Above the Jotnian sandstones come the 
Eocambrian Sparagmite, followed by the Cambro-Silurian and non-fossili- 
ferous sandstones of probably Devonian age. The Sparagmite locally shows 
a marked resemblance to parts of the Moines, but the speaker believes the 
Moines are absent from Sweden, with the possible exception of some 
granulites near the Finnish border, mentioned by Eskola. Similarly, the 
Torridonian rocks are similar in their mode of occurrence to the Jotnian 
sandstones, but look younger. The only part of the Highlands which 
closely corresponds with any part of Sweden is the area of the Lewisian, 
which is closely similar to the great gneiss area of south-western Sweden. 
These the speaker regards as highly metamorphosed equivalents of 
Groups 1 and 2 above. 
As a satisfactory correlation between Sweden and Finland has not yet 
been reached, and as there are still many points of difference in regard to 
the correlation of Sweden and Norway, it is at present very risky to attempt 
to correlate Sweden with the British Isles. 
Dr. M. Maccrecor. 
The alkaline sills, presumably of post-Cambrian age, which occur east 
of the Moine Thrust, are sheared in agreement with the country rocks. 
This fact has been used as an argument for the post-Cambrian age of the 
metamorphism, but no evidence that the sills were intruded into unaltered 
sediments has been put forward, and the shearing must be regarded as due 
to the thrusting movements that produced the mylonites. 
The speaker agrees that the ‘ rocks of Lewisian type’ in central Suther- 
landshire are an integral part of the Moines, and that certain of the rock 
types in the former can be matched in the Lewisian of the foreland ; but 
as an assemblage the rocks of the Lewisian of Sutherlandshire do not 
resemble the banded and often sheared orthogneisses of the foreland. 
Strong evidence that the Moines rest unconformably upon the Lewisian 
has been obtained by the detailed survey of Ross-shire and Inverness-shire. 
Here the Lewisian contains graphite-schists and calcareous rocks of various 
kinds that are absent from the neighbouring Moines. The fact that the 
stratigraphical relation between the Moines and the Lewisian of Ross 
and Inverness is different from that between the Moines and the ‘ rocks of 
