Preliminary paper on an investigation of the Archaean formations of the northwestern states
By: by Roland D. Irving
Publisher: Government Printing Office
Published: 1885
Place of publication: Washington
Language: eng
Number of pages: 242
Subjects: Stratigraphic Geology; Geology
Notes: Extract from the 5th report of the director of the U.S. Geological Survey, 1883-84.

Cover title.

At head of title: Department of the Interior.  U. S. Geological Survey.