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V.—Archæan Rocks

Published online by Cambridge University Press:  01 May 2009

G. H. Kinahan
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Extract

At the present time the American geologists, both those of the United States and the Dominion of Canada, are at variance as to the groups the Archæan should be divided into; it is however unnecessary to enter into this controversy, as the strata may be conveniently grouped, as in Selwyn's map (1884), into Norians or Labradorians, excessively coarse gneiss or other granitic rocks; Laurentians, gneisa and granite; and Huronians, schists with subordinate gneiss.

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 11 , November 1887 , pp. 503 - 507
Copyright
Copyright © Cambridge University Press 1887

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