I have a grad student look for GIS datasets for the land use (current and historic) and stratigraphic data for the areas listed above. I suspect this might be proprietary but I'm not sure. We have books on the stratigraphy of the area and I referred her to the Perry-Castenada collection for possible maps. Any help would be appreciated. Our library hasn't purchased any datasets and I honestly am not sure what's available.. Thanks Pam Enrici Geography & GIS Librarian Univ. of MN., Duluth (on the sunny and colorful shores of Lake Superior) [log in to unmask]