Further north along the crest, getting closer to Cima di Gratera, we find outcrops of a dark blue, highly deformed rock sitting immediately on top of the serpentinite. These rocks are glaucophane-bearing metagabbros! They, therefore, represent material from an oceanic crust (i.e., gabbros sitting on top of mantle rocks) which was, as for the antigorite-bearing serpentinites (stop 1.6), transformed to blueschist-facies conditions as a result of subduction!
