Owen, David Dale, 1807-1860Shows 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)JPEGb820bc56-d28e-4515-82f0-3882f1d60002engPublicProvisional 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.MapsWisconsin1848University of Michigan