Includes 3 cross-sections showing bedrock.; Includes outline of the geological history of Wisconsin and elevations above mean sea level of important lakes, rivers and prominent hills. 28 x 42 centimeters Scale 1:1,850,000 General Map Collection
Use of this item may be governed by US and international copyright laws. You may be able to use this item, but copyright and other considerations may apply. For possible additional information or guidance on your use, please contact the contributing organization.