A K slicing of the Reissner-Nordstrom (RN) spacetime is shown to provide a
complete foliation of the region up to the inner horizon, and the horizon t
o correspond to the limit as K -->+/-infinity. The implications of this fol
iation in the context of York time are discussed. (C) 1999 American Institu
te of Physics. [S0022-2488(99)00909-3].