Interior Low Plateaus’ Cave alumroot near dormant state.
Heuchera parviflora var. parviflora
couldn’t help stopping by this population for fun
this species var. is only found in the sub region of the Appalachian mountains ranging from the Ohio River Valley down through Dan Boone into the Cumberland Gap passing the cedar barrens of central TN basin into Alabama dolomites and sandstone hills known as the Interior Low Plateaus.
this specific photo is from Red River Gorge, Ky
The Interior Low Plateaus are a remnant of upheval events caused by several arch events that caused secondary mountain formation along the foothills of the Appalachian mountains. This fraction of ecoregion is usually lumped into the Interior Centeral Lowlands due to glacial events being it’s primary cause.
The core of this section where the upheavals, dome deformation, and glacial weathering events have occurred in their own stratification really seem like they are a hotspot for these biological variation and local endemism events ( its honestly the part of Appalachia I am most enamored by because of how unusual it is.)
As you may know, the Interior lowlands of the North were pretty much smacked by the Wisconsin glaciation,Illinoisan glaciation, and of course the Pre Illinoisan glaciation which caused the upper prairie peninsula in Appalachia; but, it did little compared to the outwash and deposition events following the true glaciation events of the Pleistocene epoch and the rebounding and upheaval that caused glacial lakes to be depleted, platuelands to be formed, and dome formation/ depletion that followed.
Refugiums and bare rocks penetrated by prairie and Pleistocene ripperian forests in the forms of sandstone/ lime/dolostone gorges, cedar glades, and fragipan enforced fens in these regions were set into motion to eventually have population isolation events and high levels to low levels of endemism occurrences.
This region of upheaval caused by the Cincinnati arch and the upper flanks of Findlay Arch and Kankakee arches which caused the creation of the Nashville dome and its degeneration is the very same that caused the upheaval of semi concreted sandstone from preillinoisan outwash and the upheaval of the nearly to completely horizontal beds of Paleozoic sandstone, shales, and calcareous sedimentary rocks. These are the Interior Low Plateaus
The limestone of the province is marked by well-developed karst topography which can be seen in many different forms of formation, undercutting, talussing , and water weathering. Mammoth Cave National Park is considered one such location where all forms of calcareous karst formation seem to be present in some shape and form. There are even some subsurface tavertine exposures. When it comes to Sandstone formations I may be a bit biased to Red River Gorge, but many locations exist with sandstone cliff endemism.