2 maps : color ; 60 x 67 cm. folded in envelope 31 x 23 cm + 1 text (12 pages : maps ; 28 cm.)
OCLC
ocm08820127
Cartographic Data
Scale 1:750,000
(W 86⁰00'--W 79⁰30'/N 47⁰00'--N 42⁰30')
Title from envelope.
Sheet 1. Bouguer gravity anomaly map, Lake Huron; Insets: Bottom topography map; Free air gravity map; General geology Lake Huron region.--Sheet 2. Total magnetic intensity map, Lake Huron; Insets: Total magnetic intensity profile map; Observed total magnetic intensity contour map; General geology Lake Huron region