The Portage Lake Volcanics (Middle Keweenawan) on Isle Royale, Michigan /

Bibliographic Details
Main Author:	Huber, N. King (Norman King), 1926-
Corporate Authors:	Geological Survey (U.S.), United States. National Park Service
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1973.
Series:	Geological Survey professional paper ; 754-C. Geology of Isle Royale National Park, Michigan.
Subjects:	Volcanic ash, tuff, etc. > Michigan > Isle Royale. Geology, Stratigraphic > Precambrian. Geology > Michigan > Isle Royale. Portage Lake Volcanics (Mich.) Geology > Michigan > Isle Royale Geology, Stratigraphic > Precambrian Volcanic ash, tuff, etc > Michigan > Isle Royale

Description
Item Description:	"Prepared in cooperation with the National Park Service."
Physical Description:	iv, C32 pages : illustrations ; 29 cm.
Bibliography:	Bibliography: pages C30-C32.