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Lithics Home | Counties A-Z | Geologic Systems | Lithic Types | Chert Drawers | Lithics Program   Drawer # 3 System(s): Quaternary   Lithic Type:   Knife River Flint County(s):   Crawford, Kossuth Lithic Type:   Glacial Till County(s):   Henry, Humboldt, Marion Lithic Type:   Tongue River Silica County(s):   Jackson Lithic Type:   Glacial Till Chalcedony County(s):   Marion Lthic Type:   Glacial Till Chert County(s):   Marion   (Rear) Tongue River Silica Jackson Co. JK-A Tongue River Silica Jackson Co. JK-A+ Glacial Till Marion Co. MA-B3   Glacial Till Marion Co. MA-B3+   Glacial Till Humboldt Co. HB-A+   Knife River Flint Kossuth Co. KH-A   Glacial Till Marion Co. MA-B2+   Glacial Till Marion Co. MA-B4   Glacial Till Humboldt Co. HB-A   Glacial Till Marion Co. MA-A1+   Glacial Till Marion Co. MA-B2   Glacial Till Marion Co. MA-B4+   Glacial Till Henry Co. HN-I1+   Glacial Till Marion Co. MA-A2   Glacial Till Marion Co. MA-B1+ Image #2 Glacial Till Chalcedony Marion Co. MA-B5 Glacial Till Henry Co. HN-I1   Glacial Till Marion Co. MA-A2+   Glacial Till Marion Co. MA-B1   Glacial Till Chalcedony Marion Co. MA-B5+ Knife River Flint Crawford Co. CF-A   Glacial Till Marion Co. MA-A3   Glacial Till Marion Co. MA-A3+   Glacial Till Chert Marion Co. MA-B6     (Front) Updated by Tricia R. Bender, Web Designer Mary De La Garza, Web Master Click here to go back to the OSA homepage. Click here to go to The University of Iowa website.