Cormac mcCarthy - Locations

What is appears to be one of the most significant aspects of McCarthy's writing is his concern with America/American locations, in particular the South West. That's certainly the case with the book I'm currently reading - 'Blood meridian' - which is set on the Mexican/ American border in the 1800s and tells of an incredibly ruthless and violent wild west. His 'Border Trilogy' is set in the American south west also, although I haven't read any of those so I don't know much about them. 'No Country for Old Men' is also set around the Mexican border, although in 1980. 'The Road is much more ambiguous (everything is destroyed and ashen in a fairly homogeneous way) but can also be interpreted as being in the American south, due to the mention of plantation style houses and a mention of 'Rock City', a natural rock formation on top of Lookout Mountain, outside chatanooga.