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Lithics Home | Counties A-Z | Geologic Systems | Lithic Types | Chert Drawers | Lithics Program   Drawer # 3 System(s): Quaternary     Lithic Type: Till Cobble County(s): Marion/Sac   Lithic Type: WI-Type Chalc. Till County(s): Marion   Lithic Type: Chalcedonic Till Cobble County(s): Marion   Lithic Type: Tongue River Silica County(s): Ringgold   Lthic Type: Glacial Till County(s): Sac   (Rear) Chalcedonic Till Cobble Marion Co. MA-B 429+ Chert Till Cobble Marion Co. MA-B 430 Till Cobble Sac Co. SA-B 506+ Glacial Till Sac Co. SA-B 526 Chalcedonic Till Cobble Marion Co. MA-B 429 Chert Till Cobble Marion Co. MA-B 430+ Till Cobble Sac Co. SA-B 506 Glacial Till Sac Co. SA-B 526 + Till Cobble Marion Co. MA-B 428 + Wisconsin-Type Chalcedony Till Marion Co. MA-B 431 Glacial Till Sac Co. SA-A 525 + Glacial Till Sac Co. SA-C 527 Till Cobble Marion Co. MA-B 428 Wisconsin-Type Chalcedony Till Marion Co. MA-B 431+ Glacial Till Sac Co. SA-A 525 Glacial Till Sac Co. SA-C 527 + Till Cobble Marion Co. MA-B 427 + Tongue River Silica Ringgold Co. RN-A 254 Till Cobble Sac Co. SA-A 505 + Glacial Till Sac Co. SA-D 528 Till Cobble Marion Co. MA-B 427 Tongue River Silica Ringgold Co. RN-A 254+ Till Cobble Sac Co. SA-A 505 Glacial Till Sac Co. SA-D 528 +   (Front) Updated by Tricia R. Bender, Web Designer Mary De La Garza, Web Master July 2009 Click here to go back to the OSA homepage. Click here to go to The University of Iowa website.