Honestly I have yet to tackle a soil like that. So I would only be guessing. I would start with about 6 inches of partially composted ramial wood chips though and maybe even try a hugelkultur bed. Does anything at all grow there? If so use those native species present as your cover crops!  What we can't recover, sometimes the native biology can. It's worth a try. Going to need some kind of native legume though.
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Scott
AKA The Redbaron
"Permaculture is a philosophy of working with, rather than against nature; of protracted & thoughtful observation rather than protracted & thoughtless labour; & of looking at plants & animals in all their functions, rather than treating any area as a single-product system."
Bill Mollison
co-founder of permaculture
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