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Excerpt from The Journal of Geology, 1909, Vol. 17: A Semi-Quarterly Magazine of Geology and Related Sciences I See Adams and Barlow, The Nepheline and Associated Alkali Syenites of Eastern Ontario, Transactions Royal Soc. Can., 1908. F D. Adams, The Laurentian System in Eastern Canada, Q. J. G. S 1908, In the associated gneisses, is absent or is present only in very small amount. Pyroxene or biotite often replaces the hornblende in part. The amphibolites are sometimes rather coarse, but usually medium or fine in grain, and they possess as a general rule a more or less pronounced foliated structure. They occur, as has been mentioned, associated, on the one hand, with the gabbro or diorite intrusions and as inclusions abounding throughout the granite of the bathyliths, and on the other hand they are often so intimately associated with certain developments of limestone inithe form of interbedded layers that it has been found necessary to map the two ro'cks together and to desig nate them by a single color. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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