Geologic map of the Creal Springs quadrangle, Illinois /

Bibliographic Details
Main Author:	Trask, C. Brian
Corporate Authors:	Illinois State Geological Survey, Geological Survey (U.S.), Cooperative Geological Mapping Program (U.S.)
Other Authors:	Jacobson, R. J.
Format:	Map
Language:	English
Published:	Champaign, Ill. : Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey, 1990.
Series:	Illinois geologic quadrangle map ; map IGQ-4.
Subjects:	Illinois > Geology > Creal Springs Region > Maps. Geology > Illinois > Johnson County > Maps. Geology > Illinois > Williamson County > Maps.

Description
Item Description:	Relief shown by contours and spot heights. "Contour interval 10 feet." "Geology compiled 1980 to 1987." "Prepared in cooperation with the U.S. Geological Survey, Dallas L. Peck, Director, under the Cooperative Geologic Mapping Program (COGEOMAP)." Includes text, col. stratigraphic column, col. cross section and index and location maps. Cartographic material.
Physical Description:	1 map : color ; 58 x 46 cm., on sheet 83 x 99 cm., folded in envelope 31 x 23 cm.
Bibliography:	Includes bibliographical references.