The Warsaw Formation around Keokuk produces some of North America’s most collected geodes — start with documented beds, then cross into Illinois and Missouri belt counties.
3 spots in Iowa.
Plan your trip with individual listing pages below — fees, access, and seasonal notes vary by site. Use rockhounding sites near me to sort by GPS, or see all rockhounding sites in Iowa.
The Warsaw Formation around Keokuk produces some of North America’s most collected geodes — quartz and calcite-lined nodules weathered from limestone and creek exposures. This hub lists 3 related Iowa directory sites to plan a Keokuk-area trip.
Geology does not stop at state lines. Pair Iowa listings with Illinois and Missouri geode hubs, then sort live with geode near me GPS if you are traveling from elsewhere.
Many classic road cuts and farms are private. Prefer documented public or permission-based sites, ask landowners, and never dig posted pasture. Wear eye protection when cracking nodules.
Spring and fall are kinder than summer humidity or winter ice. After rain, creek gravel and freshly eroded banks expose new material. Start with the primary Keokuk beds listing, then fan out to related Iowa pins below.
Use the geodes specimen map and geode near me GPS for distance sorting, the national geode hunting guide for belt context, and Iowa / Illinois / Missouri state × type hubs when you cross borders.
The Keokuk geode belt centred on Keokuk, Iowa, where the Mississippian Warsaw Formation yields chalcedony-shelled geodes lined with quartz, calcite, pyrite and marcasite across a tri-state area of southeast Iowa, northeast Missouri and western Illinois.
View detailsKeokuk is a documented mineral occurrence near IA. Reported specimens include Keokuk geodes, calcite, chalcedony, limonite, marcasite, pyrite, sphalerite. Verify land access and collecting rules before visiting.
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Burlington (geodes) is a documented mineral occurrence near IA. Reported specimens include Lake Superior Agate, Quartz crystals, Geodes. Verify land access and collecting rules before visiting.
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