The Collaborative International Dictionary of English v.0.48:

Faulting \Fault"ing\, n. (Geol.)
   The state or condition of being faulted; the process by which
   a fault is produced.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fault \Fault\, v. t. [imp. & p. p. Faulted; p. pr. & vb. n.
   Faulting.]
   1. To charge with a fault; to accuse; to find fault with; to
      blame. [Obs.]
      [1913 Webster]

            For that I will not fault thee.       --Old Song.
      [1913 Webster]

   2. (Geol.) To interrupt the continuity of (rock strata) by
      displacement along a plane of fracture; -- chiefly used in
      the p. p.; as, the coal beds are badly faulted.
      [1913 Webster]

WordNet (r) 3.0 (2006):

faulting
    n 1: (geology) a crack in the earth's crust resulting from the
         displacement of one side with respect to the other; "they
         built it right over a geological fault"; "he studied the
         faulting of the earth's crust" [syn: fault, faulting,
         geological fault, shift, fracture, break]