No abstract

A 200page syllabus was prepared for the second conference and published by the Indiana Geological Survey. Continuing interest in and demand for the syllabus prompted us to update and expand its contents. The result is this book.We hope this work will be useful as a text or supplementary text for advanced undergraduate and graduate courses in sedimentation, sedimentary petrology, or general petrology and perhaps will be helpful to the teachers of such courses. Though we have focussed on sandstones we have necessarily included much of interest to students of all sediments. We hope also that it will be a useful reference work for the professional geologist, especially those concerned with petroleum, ground-water, and economic geology either in industry or government. Because the subject is so closely tied to surface processes it may also be of interest to geomorphologists and engineers who deal with beaches and rivers where sand is in transit.This work presupposes a general knowledge of the elements of mineralogy, chemistry and statistics on the part of the reader. As no investigation of sediments -especially sandstones -can be considered adequate or complete without careful microscopical analysis, we also presume, therefore, that the user of this book has the knowledge and skills needed to study sands and sandstones under the microscope.

No abstract

No abstract

and F. B. VAN HOUTEN of Princeton University. We are indebted also to BEVAN FRENCH for some help with the Russian literature. Special thanks are due H. E. CLIFTON and COLIN McANENY, graduate students at Johns Hopkins University, for their substantial help in compiling the glossary. WILLIAM HILLER and CHARLES WEBER photographed some of our specimen material and also made most of the prints from our negatives. We wish to thank MARY GILL for her patience and skill in typing our manuscript. And lastly we are indebted to our publishers for seeing the book through the press and for their help and encouragement.

No abstract

No abstract

Western sector.________________________________ Central sector._________________________________ Eastern sector._________________________________ Bedrock geology.___________________________________ Nomenclature of Precambrian units.______________ General outline of stratigraphy.__________________ Stratigraphy. __^____-__________________________ Greenstone in the Brule River area ___________ Saunders Formation ______________________ Description. ___________________________ Thickness and relations to adjacent formations. _______________________________ Baraga Group._____________________________ Hemlock Formation___________________ Greenstone in the Hemlock Formation-Bird Iron-Bearing Member.._________ Thickness and relations to adjacent formations. ______________________ Amasa Formation...____________________ Description-_______________________ Thickness and relations to adjacent formations. ______________________ Michigamme Slate._____________________ General aspects___________________ Uppermost part of the formation. Lower and middle parts of the formation.. ___________________________ Thickness and relations to adjacent formations. ______________________ Badwater Greenstone__________________ General aspects of the greenstone masses. _________________________ North belt...___________________ South belt....___________________ East belt.__..._.._____________ Other occurrences of greenstone...... The greenstones as possible spilites____ Stratigraphic relations.______________ Conditions of deposition of the Baraga Group_____________________________ Paint River Group..________________________ Dunn Creek Slate____________________ Lower part of the Dunn Creek Slate in the Crystal Falls area._-___-_-_-Gray sericitic slate and siltstone__-_-Wauseca Pyritic Member.___________