English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The area discussed in this report forms the northern part of the Great Plains and extends from the eastern border of the Dakotas to the foothills of the Rocky Mountains and from the Canadian border into northern Wyoming and South Dakota. The section on geology . is based on a number of published and unpublished reports on different parts of the area, and only enough description of each group or formation is given to show the relation of the ground water to the rock mat~rials with which it comes into contact. · The waters are discussed with reference to their chemical character and the alterations noted in the analyses of waters from different formations, o.f waters from the same formation in different localities, and of waters from different horizons in a formation. Chemical and geologic results in published reports of numerous investigations of ground water in parts of Montana and the Dakotas, together with a large number of unpublished analyses made for individual reports, furnished the basis for a general study of the relation between the waters and the rocks of the northern Great Plains. About 400 of the unpublished analyses, made by Margaret D. Foster, C. S. Howard, and the writer, represent samples collected from the area by geologists of the United States Geological Survey and the North Dakota Geological Survey, and about 700 partial analyses were made in other laboratories for purposes that do not require analyses so complete as those made in the water-resources laboratory of the United States Geological Survey.

Chemical character of ground waters of the northern Great Plains