Publisher's Synopsis
Excerpt from The Geological and Natural History Survey of Minnesota: The Twelfth Annual Report, for the Year 1883
Calcareous tufa in the gorge below the falls of St. Anthony. Granular quartz, falls of Pokegama, upper Mississippi. Agate, imbedded in trap-rocks of lake Superior.
Hornblende, as a constituent of the primitive rocks of the upper Mississippi.
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.
