Geologic subregions of the Interior Highlands.  Inset shows the region in context of the entire United States.

 
  Part of: Skvarla M, Fisher D, Schnepp K, Dowling A (2015) Terrestrial arthropods of Steel Creek, Buffalo National River, Arkansas. I. Select beetles (Coleoptera: Buprestidae, Carabidae, Cerambycidae, Curculionoidea excluding Scolytinae). Biodiversity Data Journal 3: e6832. https://doi.org/10.3897/BDJ.3.e6832