Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 57 (1950) > Annual Issue
Document Type
Research
Abstract
The city well No. 8 at Dubuque, Iowa penetrated slightly more than 15 feet of the upper part of the crystalline pre-Cambrian basement complex. This well is of particular interest because it is the southeastern-most of the 15 wells in Iowa known to reach the crystalline basement, and because samples from the well were sufficiently large to permit preparation of thin sections for petrographic examination. The well was drilled in 1946 to a depth of 1,781.7 feet by the Varner Well Company of Dubuque. Drilling was by the cable-tool method. The well is located on the floodplain of the Mississippi River at CSL SE¼ SE¼ sec. 7, T. 89 N., R. 3 E. The surface altitude is 610 feet.
Publication Date
1950
Journal Title
Proceedings of the Iowa Academy of Science
Volume
57
Issue
1
First Page
241
Last Page
244
Copyright
©1950 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Anderson, Keith E.
(1950)
"Basement Complex Biotite Granite at Dubuque, Iowa,"
Proceedings of the Iowa Academy of Science, 57(1), 241-244.
Available at:
https://scholarworks.uni.edu/pias/vol57/iss1/27