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The Girkin Formation is a geologic formation located in the Chester Escarpment of central Kentucky, USA. It comprises a level of Mammoth Cave and lies above the Ste. Genevieve Limestone and St. Louis Limestone and below the Big Clifty Sandstone in that area. The Girkin is a limestone Mississippian in age. ^[1]

Members of the Girkin are as follows in descending order:

• Beech Creek Member
• Elwren Member
• Reelsville Member
• Sample Member
• Beaver Bend Member
• Bethel Member
• Paoli Member

References

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