Preliminary geological map of parts of the Alto Pass, Jonesboro, and Thebes Quadrangles, Union, Alexander, and Jackson counties
By: By J. Marvin Weller and George E. Ekblaw.  Revised in part from map by T. E. Savage.  Explanation and stratigraphic summary by J. Marvin Weller.  Printed by authority of the state of Illinois.
Contributors: Ekblaw, George Elbert, 1895- joint author.; Savage, Thomas Edmund, 1866-
Published: 1940
Place of publication: Urbana, Ill
Language: eng
Number of pages: 26
Subjects: Geology -- Illinois
Notes: Bibliographical foot-notes.
At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey ...