"' Harpeth River State Park "'is a state park in incised meander in the river known as the "'Narrows of the Harpeth "'and its associated national historic landmark, the Montgomery Bell Tunnel.
12.
The incised meanders of the Jackson Creek demonstrate the downcutting of the Newer Volcanics and have formed rapids and small falls, along with outcrops of columnar basalts and tessellated pavements, for example at the Organ Pipes National Park near the Calder Freeway, a prominent display of basaltic columns so named because they look like organ pipes.
