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- |tree4=Loughridge Sandstone Member ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.2 KB (319 words) - 18:22, 12 January 2017
- |tree4=Nokomis Sandstone Member ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.3 KB (337 words) - 18:26, 12 January 2017
- ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...ghly varied unit of sandstone, dolomite, and shale overlying the St. Peter Sandstone, is named for Glenwood Township, Winneshiek County, northeastern Iowa.5 KB (682 words) - 18:18, 12 January 2017