Geology and Ground Water of the Trout Lake Region, Vilas County, Wisconsin Open-file report; contains unpublished data that has not yet been peer-reviewed. Bedrock Geology Groundwater Surficial Geology Data and Resources WOFR1936-01 Geology and Ground Water of the Trout Lake Region, Vilas County, Wisconsin Fries, Carl, Jr.; 1936 Report: 23 p. Download Related Collections Open-File Report View Open-File Report