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Lithics Home | Counties A-Z | Geologic Systems | Lithic Types | Chert Drawers | Lithics Program   Drawer # 10 System(s): Pennsylvanian-Mississippian   Lithic Type:   Bog Iron County(s):   Wapello Lithic Type:   Verdi County(s):   Henry, Van Buren Lithic Type:   Croton Formation County(s):   Story Lithic Type:   Croton Chalcedonic County(s):   Henry, Jefferson   (Rear) Verdi Henry Co. HN-J   Verdi Henry Co. HN-J+   Croton Chalcedonic Henry Co. HN-D+   Croton Chalcedonic Henry Co. HN-H   Verdi Henry Co. HN-B+   Verdi Henry Co. HN-L+   Croton Chalcedonic Henry Co. HN-D   Croton Chalcedonic Henry Co. HN-H+   Verdi Henry Co. HN-B   Verdi Van Buren Co. VB-E   Croton Chalcedonic Henry Co. HN-6+   Croton Chalcedonic Jefferson Co. JF-D1   Verdi Henry Co. HN-7+   Verdi Van Buren Co. VB-E+   Croton Chalcedonic Henry Co. HN-6   Croton Chalcedonic Jefferson Co. JF-D1+   Verdi Henry Co. HN-7   Croton Formation Story Co. SR-A1   Croton Formation Story Co. SR-A2+   Croton Chalcedonic Jefferson Co. JF-D2   Bog Iron Wapello Co. WP-A+   Croton Formation Story Co. SR-A1+   Croton Formation Story Co. SR-A2   Croton Chalcedonic Jefferson Co. JF-D2+     (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.