Background Radioactivity in the Decorah Fault Region

Authors

Philip J. Lorenz, Upper Iowa UniversityFollow
Orville C. Rodenberg, Upper Iowa University
Larry G. Shadle, Upper Iowa University
Alan C. Antes, Upper Iowa University
William D. Hess, Upper Iowa University

Document Type

Research

Abstract

A known fault site at Decorah, Iowa, was surveyed for indicative variations in surface radioactivity. A portable ionization chamber revealed significant increases in gamma ray intensity at several locations. At one point the radiation level was 70% greater than the background intensity. Measurements repeated one year later verified this pattern. Radiation contours were plotted over an extensive area in the city of Decorah. This map, with other items of supporting evidence, indicated a possible fault strike of approximately N 55° W.

Publication Date

1961

Journal Title

Proceedings of the Iowa Academy of Science

Volume

68

Issue

1

First Page

397

Last Page

403

Copyright

©1961 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Lorenz, Philip J.; Rodenberg, Orville C.; Shadle, Larry G.; Antes, Alan C.; and Hess, William D. (1961) "Background Radioactivity in the Decorah Fault Region," Proceedings of the Iowa Academy of Science, 68(1), 397-403.
Available at: https://scholarworks.uni.edu/pias/vol68/iss1/56