Blackfield: [Black + Field] = [Dark + Landscape]
Dark Landscape = Dire Earth
The things you realize in hindsight! These connections were not on purpose, in fact they just occurred to me this morning.
Incidentally, I actually named Russell Blackfield after a music group of the same name.
Nightcliff is a real part of Australia's Northern Territory, on Darwin's northern edge. I picked it for the elevator's base simply because I thought the name was cool.
Dire Earth? My editor suggested that for the series name when all the names I suggested were no good.