Preliminary seismotectonic map of the central Mississippi Valley and environs /

Bibliographic Details
Main Author:	Heyl, Allen V. (Allen Van), 1918-2008
Corporate Author:	Geological Survey (U.S.)
Other Authors:	McKeown, F. A. (Francis Alexander), 1920-
Format:	Government Document Map
Language:	English
Published:	Reston, Va. : The Survey, 1978.
Series:	Miscellaneous field studies ; map MF-1011.
Subjects:	Geology, Structural > Mississippi River Valley > Maps.

Description
Item Description:	Relief shown by contours and spot heights. Ancillary sheet includes text. Cartographic material.
Physical Description:	1 map ; on sheet 106 x 122 cm., folded in envelope 25 x 32 cm. + 1 sheet (97 x 86 cm.)
Bibliography:	Includes bibliographical references on ancillary sheet.