Reports on a Portion of Algoma and Thunder Bay Districts, Ontario, And, on the Region Lying North of Lake Superior Between the Pic and Nipigon Rivers, Ontario (Classic Reprint)

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Excerpt from Reports on a Portion of Algoma and Thunder Bay Districts, Ontario, And, on the Region Lying North of Lake Superior Between the Pic and Nipigon Rivers, Ontario Dikes of diabase varying from one inch to fifty feet in width, are common both in the granites and schists, and in a few places larger masses of this rock were noted. Of the specimens brought in, Mr. G. A. Young says they are all of ordinary types of diabase, in no instances holding olivine. One specimen is porphyritic, and a second shows a fine grained porphyritic contact facies. 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.