The Glenwood beds as a horizon marker at the base of the Platteville formation
By: by Arthur Bevan. Printed by authority of the state of Illinois.
Published: 1926
Place of publication: Urbana, Ill
Language: eng
Number of pages: 13
Subjects: Geology, Stratigraphic -- Ordovician.; Geology -- Illinois.
Notes: Bibliographical foot-notes.
At head of title: State of Illinois. Department of registration and education. Division of state geological survey.