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We took a detour on the way home through our old homeland of Lexington to eat at a favorite restaurant, then drove through downtown on our way out. I miss Lexington.

It's possible, if you want to climb around some really slick boulders, to get behind and underneath Eagle Falls. This is as far as I wanted to go.

Eagle Falls is a little waterfall along a tributary that meets the Cumberland just downstream of Cumberland Falls. The flow isn't usually this vigorous. I should have taken two steps to my right when I shot this, but I was overly concerned with the spray getting my lens wet.

The cliffs above the Cumberland River just downstream of the falls are sandstone, which the internet tells me dates to the early Pennsylvanian, about 200 million years ago. This sandstone shows lots of cross bedding, an artifact of the manner in which it was deposited.

Like all sedimentary rock, sandstone is laid down horizontally. Some sandstone, though, shows segments of bedding planes at an angle a little over 30 degrees to the plane of deposition. This suggests the sand was deposited in dunes. These dunes can be the result of winds in arid regions, or they can be water-driven dunes deposited in rivers, estuaries, or along shorelines. You can also find things like ripple marks at Cumberland Falls, and the sandstone overlays lot of very pebbly conglomerate. 200 million years ago, there was a river here, but it flowed the opposite direction of the Cumberland.

The cliffs along the Eagle Falls Trail offered fun geological diversions ... for me. This was one of those spots where I kept telling Robin things she didn't really care about. But the geology here was fun. You can see a lot in this wall.