  The McLerran-Venugopalan model provides a framework which allows one to
compute the gluon distribution function of a very large nucleus from the
equations of QCD, provided that the longitudinal momentum fraction, xF, is
sufficiently small. The source of color charge for this computation may be
thought of as a crepe moving along the z axis at the speed of light. We refine
the MV model by allowing for the presence of non-trivial longitudinal
correlations between the color charges that comprise the nucleons. We find that
a consistent treatment forces us to consider a pancake-like source which moves
at slightly less than the speed of light. Our calculation allows us to consider
larger values of xF than were allowed in the original MV model.
