- Description:
- Scale is approximate (W 93⁰--W 87⁰/N 47⁰--N 42⁰30ʹ)
- Creator:
- Chamberlin, Thomas Chrowder, 1843-1928
- Contributor:
- Wisconsin; Chief Geologist.
- Created:
- 1881
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Last Updated:
- 2020-11-03