Now available online: The historical mineral exploration records (logs, cross sections, geologic maps, and geophysical survey data) collected by Ernest K. Lehmann & Associates. These records contain nearly all that is known about Wisconsin’s buried and undeveloped mineral deposits, a boon for anyone interested in understanding the Precambrian geology of the more remote parts of the state.
We have scanned and made digitally available those documents that are directly connected to cores in our collection (about 25 percent of the material). Scanned documents can be viewed, downloaded, and printed from this web application. All other documents may be viewed by appointment. They are stored by WGNHS in an offsite archive. To make an appointment, please call 608-262-1705.
Click below to open the app.