Provisional geological map of part of the Chippeway sand district of Wisconsin with part of Iowa & of Minnesota Terratory [sic]: to illustrate the report of a geological reconnoissance made in 1847; by David Dale Owen.
Shows area north and west of Wisconsin River watershed and south and east of the Saint Louis River and the upper Mississippi River. From: Senate ex. doc., 30th Cong., 1st session, no. 57. 1 map: hand col.; 83 x 61 cm e geological sections (14 sheets; 32 x 61 cm or smaller) This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.