Iowa Academy oe Science Peate II 
Sections in the Fort Dodge gypsum area. G. Gravel; T. Glacial till; Ft. D. Fort Dodge beds; D. M. Des Moines beds; Ste. G. Ste. Genevieve 
beds; St. L- St. Louis beds; M. Mississippian ; S. Sh. Sandy Shale; Gyp. Gypsum; Sh. Shale; Ls. Limestone; Ss. Sandstone. Figures give elevations 
above sea level as instrumentally determined. Small numbers refer to localities shown on map, figure 1. 
