Geological Survey of Canada: Report of Progress, for 1871-72 (Classic Reprint) - Tapa blanda

Excerpt from Geological Survey of Canada: Report of Progress, for 1871-72

He measured in all about eighty miles of roads, rivers, streams and lines through the woods, and registered the strike, dip and mineral character of every rock exposure met with. Eight miles of the distance mentioned were measured by theodolite and chain, and the remainder by prismatic compass and chain. About one third of the measurements were made in the woods under great difficulties, in consequence of the unevenness of the ground, and a thick growth of underbush, which necessitated a great deal of chopping. The area included in the measurements may be about sixty square miles.

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