K-bentonites of the Ordovician Decorah Subgroup, Upper Mississippi Valley : correlation by chemical fingerprinting /

Bibliographic Details
Main Author:	Kolata, Dennis R.
Other Authors:	Frost, Joyce K., Huff, Warren D.
Format:	Book
Language:	English
Published:	Champaign, IL : Illinois State Geological Survey, 1986.
Series:	Circular (Illinois State Geological Survey) ; 537.
Subjects:	Bentonite > Mississippi River Valley. Geology, Stratigraphic > Ordovician. Stratigraphic correlation > Mississippi River Valley.

Description
Physical Description:	30 pages : illustrations, maps ; 28 cm.
Bibliography:	Bibliography: pages 25-27.