Corryville Formation

{{Short description|Fossil-rich geological formation}}

{{Infobox rockunit

| name = Corryville Formation

| image = Corryville Fm Maysville KY.jpg

| caption = Corryville Formation (Upper Ordovician, Katian) exposed in Maysville, Kentucky.

| type = Formation

| age = Ordovician

| period = Ordovician

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| region = Ohio, Kentucky

| country = United States

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The Corryville Formation is a geologic formation in Ohio and Kentucky. It preserves fossils dating back to the Ordovician period.