At St. Peter, where the Northwestern Railroad crosses the Minnesota River, alluvial clay occupies a considerable area. This has the usual appearance and is apparently of the same quality as that found at Le Sueur. It was used 20 years ago for brick to build the asylum at St. Peter, and a similar deposit was developed just across the river at Kasota. Both plants are now closed. (Clays and Shales of Minnesota, Frank F. Grout and E. K. Soper, The University of Minnesota, Minneapolis, Minnesota, 1914, Page 136)