The Glenwood beds as a horizon marker at the base of the Platteville formation, by Arthur Bevan. Printed by authority of the state of Illinois.
Material type:
TextPublication details: Urbana, Ill., 1926.Description: 13 p. illus., map., tables. 25 cmSubject(s): LOC classification: - QE662 .B4
At head of title: State of Illinois. Department of registration and education. Division of state geological survey.
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