Winchell, N.H.2010-01-082010-01-081901https://hdl.handle.net/11299/56301Contains 88 geographical and geological plates.Summary of the geological and natural history studies carried out in Minnesota between 1872 and 1901. Published in 6 volumes. Vol 6 is an Atlas, comprised of County maps with short summaries of geology and natural history.engeologyatlasMinnesotageographicalMap