The Earth Beneath the Continents
Copyright © 1966 by the American Geophysical Union
Editor(s): John S. Steinhart, T. Jefferson Smith
Published Online: 3 APR 2013
Print ISBN: 9780875900100
Online ISBN: 9781118668955
Book Series: Geophysical Monograph Series
About this Book
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 10.
It was clear in the early stages of interpretation that the crust in the Lake Superior region is of far greater complexity than might have been supposed from earlier, less detailed work in the shield areas. This fact made it especially desirable to include in the volume along with the seismic studies the latest available results from other geophysical and geological investigations of the region. This has been done, and the first two sections of the present volume constitute the realizable portion of the original hope for a comprehensive description of the geophysical character of the Lake Superior region. The story is, of course, far from complete. Additional seismic experiments were mounted in 1964, and a large one is in progress as this is being written. Detailed gravity surveys and combined geological-geophysical studies are being pursued, while new studies of heat flow, magnetics, and conductivity are under way or already complete. We hope that these investigations will provide answers to some of the many questions still remaining about the structure of the Lake Superior area.