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Document Type

Research

Abstract

As an integral part of its program of geologic and ground-water studies, the Iowa Geological Survey in cooperation with the United States Geological Survey has for many years systematically collected and analyzed drill cuttings and related information from water wells and other boreholes drilled throughout Iowa. The usefulness of these data is increased greatly by determining the exact location and land-surface altitude of the well sites. As most well samples are collected at approximately 5-foot intervals during the drilling operation and as depth measurements by many well drillers are not precise, land-surface altitudes having an accuracy of 5 feet are satisfactory for most purposes. The time and personnel available for this work prohibits the use of precise leveling instruments on the scale necessary for maximum coverage throughout the State. These instruments, of course, are essential where altitude work of a precise nature is needed in a small area.

Publication Date

1953

Journal Title

Proceedings of the Iowa Academy of Science

Volume

60

Issue

1

First Page

393

Last Page

398

Copyright

© Copyright 1953 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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