Aeromagnetic map of the McNair-Grand Portage area, northeastern Minnesota /

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Bibliographic Details
Corporate author / creator:Geological Survey (U.S.)
Imprint:Washington, D.C. : The Survey, 1969.
Description:1 map ; 79 x 138 cm.
Series:Geophysical investigations map GP-639
Geophysical investigations (Geological Survey (U.S.)) map GP-639
Subject:Geomagnetism -- Minnesota -- Cook County -- Maps.
Geomagnetism -- Minnesota -- Lake County -- Maps.
Minnesota -- Cook County.
Minnesota -- Lake County.
Cartographic data:Scale 1:125,000 W 91°15ʹ--W 89°30ʹ/N 48°08ʹ--N 47°15ʹ).
Format: Map U.S. Federal Government Document Print
Local Note:Stored in vertical file.
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Notes:Relief shown by spot heights.
"Aeromagnetic survey flown ... by R. A. Sheddon, 1966. Compilation supervised by C. L. Kruger."
Includes inset and index map.

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