The Kanwaka Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.

• List of fossiliferous stratigraphic units in Iowa
• Paleontology in Iowa

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

This article about a specific stratigraphic formation in Iowa is a stub. You can help Wikipedia by expanding it.

• v
• t
• e

This article related to the Carboniferous period is a stub. You can help Wikipedia by expanding it.

• v
• t
• e