Geological Survey Bulletin (Volume 966-967) (Paperback)

This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not illustrated. Excerpt: ... Page Introduction 95 0. General geophysical subjects 97 1. Gravitational methods 98 2. Magnetic methods 102 3. Seismic methods 113 4. Electrical methods 127 5. Radioactive methods 132 6. Geothermal methods- . 136 7. Geochemical methods 138 8. Drill-hole methods 139 9. Unclassified geophysical subjects 140 10. Related geological subjects 141 11. Technical aids to exploration 146 12. Patents . 148 Index 164 Errata ---. 165 Note.--For a greater differentiation of contents section 8 of previous reports is replaced by section 0 and section 9, and the former section 9 is replaced by section 10 and 11. An additional section on drill-hole methods, section 8, is introduced. A double dagger (+) after an entry indicates that the publication was reproduced by other means than ordinary printing. m INTRODUCTION Geophysical Abstracts are issued by the Geophysics Branch of the Geological Survey, United States Department of the Interior, as an aid to those engaged in geophysical research and exploration. The publication covers world literature on geophysics contained in periodicals, books, and patents. It deals with exploration by gravitational, magnetic, seismic, electrical, radioactive, geothermal, geochemical methods, and drill-hole methods, and with underlying geophysical theory, research, and related subjects. Inasmuch as geophysicists in the field may have little opportunity to consult libraries, the policy is to provide abstracts sufficiently informative in themselves to keep readers abreast of developments in the United States and abroad. Distribution.--Geophysical Abstracts 1-86 were issued as Information Circulars by the Bureau of Mines; 87-111 were issued as Bulletins of the Geological Survey; and 112-127 were issued as Information Circulars by the Bureau of Mines. Beginnin...