IV.—The Crystalline Rock-areas of the Piémontese Alps

Abstract

In the preceding paper I described the crystalline rock-areas of the Maritime and Cottian Alps: I now proceed to briefly review those of Northern Piémont forming part of the Grajan and Pennine Alps, under three heads—I. The Lanzo Valleys and Gran Paradiso Groups.II. The Dora Baltea (Val d'Aosta) Area.III. The Lanzo, Ivrea, and Val Sesia Area.They are shown in the sketch-map, Fig. 1. The conclusions in reference to the combined areas of the Piémontese Alps will be stated at the end of the present paper.