Sunk Lake State Natural Area
🏆 Sinkhole Lake — Rare karst depression lake in the Tennessee landscape
Sunk Lake State Natural Area preserves a rare sinkhole lake — a body of water formed when underlying limestone dissolved, creating a depression that filled with water. These karst features are uncommon in Tennessee and support unique aquatic and wetland communities adapted to the lake’s distinctive hydrology and chemistry.
Visitor Information
| Detail | Information |
|---|---|
| Location | Tennessee |
| Entry Fee | Free |
| Feature | Sinkhole lake (karst depression) |
Frequently Asked Questions
What is a sinkhole lake?
Sinkhole lakes form when limestone bedrock dissolves underground, creating a depression that fills with water. They are geological indicators of karst terrain and can support unique aquatic species.
About Sunk Lake
Sunk Lake State Natural Area in Obion County protects a natural lake in the Mississippi River floodplain of West Tennessee — formed when the land literally sank during the catastrophic New Madrid Earthquakes of 1811-1812 (the most powerful earthquakes in recorded North American history). Reelfoot Lake nearby was created by the same seismic event.
Things to Do
Viewing the earthquake-formed lake, birdwatching in the bottomland forest, fishing, and learning about the New Madrid Earthquakes that reshaped the Mississippi Valley landscape.
About Sunk Lake
Sunk Lake State Natural Area in Obion County protects one of the New Madrid earthquake lakes — created when the catastrophic 1811-1812 earthquakes (estimated magnitude 7.5-8.0) caused the ground to sink, forming lakes where dry land had been. These “sunken lands” in northwestern Tennessee are physical evidence of the most powerful earthquakes in recorded North American history — quakes that rang church bells in Boston and reversed the Mississippi River.
Things to Do
Observing the earthquake-created lake, birdwatching (the lake attracts waterfowl), fishing, nature study, and standing on ground that literally sank during the most powerful earthquakes in American history.
💧 Visit Sunk Lake SNA
Rare sinkhole lake — karst geology creates a unique aquatic habitat.
