Digitized Lithic Source LocationsCounty Maps in Iowa: Geologic SourcesAdairFayetteMadisonAllamakeeFranklinMahaskaBentonFremontMarionBuchananGrundyMarshallBuena VistaHardinMillsButlerHarrisonMontgomeryCassHenryPottawattamieCedarHowardRinggoldCerro GordoJacksonStoryCherokeeJeffersonTamaClaytonJohnsonUnionCrawfordJonesVan BurenDecaturKossuthWashingtonDelawareLeeWebsterDes MoinesLinnWinneshiekDubuqueLouisaWoodbury Printer-friendly version