Maps showing bedrock topography of Lake Superior /

Bibliographic Details
Main Author:	Wold, Richard J. (Richard John), 1937-
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Map
Language:	English
Published:	Reston, Va. : The Survey, 1979.
Series:	Miscellaneous field studies ; map MF-1174.
Subjects:	Geology > Superior, Lake > Maps.

Description
Item Description:	Includes text, 3 maps (at approximately 1:2,400,000) and 38 seismic interpretations. Cartographic material.
Physical Description:	1 map ; 54 x 102 cm., folded in envelope 25 x 32 cm.
Bibliography:	Includes bibliographical references.