Geology of the Niagara-Aurora Area Open-file report; contains unpublished data that has not yet been peer-reviewed. Bedrock Geology Precambrian Bedrock Data and Resources WOFR1954-01 Geology of the Niagara-Aurora Area, Northern Wisconsin Lyons, E.J.; 1954 Map: 40 in x 30 in Download Related Collections Open-File Report View Open-File Report