The Thornton Reef (Silurian), northeastern Illinois, 1976 revisitation
By: by Lloyd C. Pray ; with a section on trilobites of the Thornton Reef (Silurian), northeastern Illinois by Donald G. Mikulic.
Contributors: Geological Society of America. North-Central Section
Publisher: Department of Geology, Western Michigan University
Published: 1976
Place of publication: Kalamazoo, MI
Language: eng
Number of pages: 21
Subjects: Geology, Stratigraphic -- Silurian.; Geology -- Illinois -- Guidebooks.
Other titles: Kalamazoo 1976.; Guidebook for a field trip on the Thornton Reef ...
Notes: "Illinois portion [of a] guidebook for a field trip on Silurian reefs, interreef facies, and faunal zones of northern Indiana and northeastern Illinois ... April 30-May 2, 1976."

At head of title: North-Central Section of Geological Society of America and Western Michigan University.

On cover: Kalamazoo 1976.

Cover title: Guidebook for a field trip on the Thornton Reef (Silurian) northeastern Illinois, with an article on distribution and community development of trilobites, Thornton Reef (Silurian).

Includes bibliographies.