Report on the Nepheline Syenite of Marathon County, Wisconsin Open-file report; contains unpublished data that has not yet been peer-reviewed. Bedrock Geology Precambrian Bedrock Data and Resources WOFR1936-03 Report on the Nepheline Syenite of Marathon County, Wisconsin Dickey, R.M.; 1936 Report: 14 p. Download Related Collections Open-File Report View Open-File Report