On page 170 in Total Skiing, there is a description of sliced turns, recommended for steeps, with packed snow.
If I understand corectly, you first pivot (or rotate) the skis until they are in the desired direction, then put them on edge to start carving. (Chris Fellows says to start slicing).
Isn't this a regular carved turn, where the top is pivoted? Like in a tight small radius turn?
He specifically says not to butter the turn ( I understand buttering to be a carve/slide combination).
From my own skiing, if I try sliding my turns on a steep slope with packed snow, it's a pretty rough ride as the snow is not very smooth. Carving gives a much smoother ride.