Last summer, I had an expiring airline voucher and a crazy idea: I should let the internet choose which geological adventure I take.
Much to my surprise, Kentucky won the poll across three of my social platforms. I cautiously approached my boyfriend and told him, “So the internet voted…” A few weeks later, we were on a plane to Louisville!
It ended up being one of my favorite trips of the year, hands down. What made this trip so special? The adventures in the rocks, of course!
Jessica Scanlan
Geologist and host of The Rock Record
Kentucky Geology
Photo courtesy of Jessica Scanlan
The geology here creates unique adventures that you’d be hard-pressed to find anywhere else. The combination of industrial history, outdoor beauty, and unexpected adventure makes this a great destination for geology lovers—and even your non-rock-loving travel partners!
The Red River Gorge area: Located in eastern Kentucky, within the Daniel Boone National Forest, the gorge cuts through resistant Pennsylvanian-age sandstone and conglomerate, especially the Corbin Sandstone Member of the Lee Formation.
These rocks formed more than 300 million years ago, when rivers carried sand and gravel from the ancestral Appalachian Mountains into a coastal plain and shallow sea.
Over time, those sediments were buried, compacted, and cemented into the thick sandstone we see today.
Later, uplift of the Cumberland Plateau fractured that sandstone. Erosion then went to work along those cracks, carving steep cliffs, rock shelters, waterfalls, natural bridges, and arches. That’s why Red River Gorge is famous for hiking and world-class rock climbing.
Go deeper: Learn more about the Red River Gorge geology here.
But sandstone is only part of Kentucky’s story. Beneath and around these landscapes are older limestones and dolomites that formed in even more ancient seas.
Central Kentucky geology: Ordovician limestones are tied to the Cincinnati Arch, a broad structural anticlinal formation that helped expose fossil-rich marine rocks across the region.
These limestones have been quarried for construction aggregate, helped shape cave and karst landscapes, and even played a role in one of Kentucky’s most famous industries: bourbon!
Trip Tips: Your Three-Day Video Guide to Geo-Tourism in Kentucky
Video Courtesy of The Rock Record
Any geo-focused Kentucky adventure should include:
A visit to the state's more than 200 arches in Natural Bridge State Resort Park
A kayak trip through a massive limestone mine. Reserve a clear kayak so you can watch the big fish swimming underneath you!
A zipline through the Louisville Mega Cavern, the largest manmade cave system in North America. Kentucky is also home to Mammoth Cave National Park, the longest cave system in the world.
A deep dive into the role geology plays in bourbon!
Watch the video above for the best ways to navigate all these Bluegrass State highlights!
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