The Glenwood beds as a horizon marker at the base of the Platteville formation,
Bevan, Arthur Charles, 1888-1968.
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. - Urbana, Ill., 1926. - 13 p. illus., map., tables. 25 cm.
At head of title: State of Illinois. Department of registration and education. Division of state geological survey.
Bibliographical foot-notes.
gs 26000138
Geology, Stratigraphic--Ordovician.
Geology--Illinois.
QE662 / .B4
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. - Urbana, Ill., 1926. - 13 p. illus., map., tables. 25 cm.
At head of title: State of Illinois. Department of registration and education. Division of state geological survey.
Bibliographical foot-notes.
gs 26000138
Geology, Stratigraphic--Ordovician.
Geology--Illinois.
QE662 / .B4