Field Work on Glacial Geology of Eastern Marathon and Western Shawano Counties Open-file report; contains unpublished data that has not yet been peer-reviewed. Surficial Geology Data and Resources WOFR1926-03 Field Work on Glacial Geology of Eastern Marathon and Western Shawano Counties Thwaites, F.T.; 1926 Report: 36 p. Download Related Collections Open-File Report View Open-File Report