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Excerpt from The Ottawa Naturalist, 1895-1896, Vol. 9: Being Vol. XI of the Transactions of the Ottawa Field-Naturalists' Club A very interesting report has recently been published by Mr. T. Nelson Dale, of the US Geological Survey, styled The Rensselaer Grit Plateau in New York. His paper is of interest to Canadian geologists since the rocks there discussed form part ofthe series so carefully studied in the earlier years of the Canadian Survey by Sir William Logan and his assistants in the province of Quebec, and the adjoining states to the south and described by him under the heading of The Quebec Group. The area reported on by Mr. Dale was also examined very thoroughly by Sir William Logan, some thirty years ago, and his note books shew many careful measurements and sections of the rock there found which are evidently the extension southward down the valley of the Hudson, ol the great series in Quebec which extends continuously from the extremity of the Gaspe Peninsula to the Vermont boundary. The arrangement and description of the strata as given by Mr. Dale, show that the same features are there found as in Quebec; and that the strata are practically the same in character. These rocks in Canada consist of green, gray, black and red or purple slates, with heavy beds of gritty sandstones which occasionally pass into fine conglomerates. In the description of the grit and associated slates stated by Mr. Dale on p. 306 of his report, they are said to consist of a dark green exceedingly tough, in some places calcareous, generally thick bedded granular rock in whrcn the quartz grains are apparent and upon closer inspection the feldspar grains also. 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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