  We report results for a 3D simulation of a layered superconductor. There are
two significant temperatures. The first corresponds to melting of the vortex
lattice in the a-b plane (T_ab) and the second to decoupling of the layers
(T_dc) with T_ab \le T_ dc. The decoupling is found to be a first order
transition with an associated entropy of ~0.25-0.4 k_B/pancake. The melting has
no obvious thermodynamic signature, and could be a crossover. The width of the
intermediate regime T_ab<T<T_dc, decreases with increasing anisotropy such that
for the more anisotropic system we cannot distinguish the melting and
decoupling temperatures.
