felspar.[1]” From this description, the epidote may be considered as forming a constituent part of the mass, and it accords with some of the varieties I found on the Malvern-hills. But as the rock which Saussure met with was in detached pieces, we cannot determine whether they were not portions of a vein.
§ 21. Since my attention has been directed to the subject, I have ascertained that epidote occurs in Cumberland, and in the Islands of Iona and Rona, two of the Hebrides, in a state similar to some of the varieties I found on the Malvern-hills. In examining some specimens from those places in the collection of Mr. Greenough, I found the following.
1. From Cumberland.
a. Crystallized epidote shooting through quartz, from Wallow Crag near Keswick, very similar to what is found in the valley of Chamouni. It is more distinctly crystallized than any I saw at Malvern. The specimens are evidently portions of a vein.
b. Epidote in a compact state, mixed with reddish felspar, forming a vein in a schistose rock from the same place.
2. From Iona.
Compact epidote disseminated in small veins, through a rock consisting of red felspar and quartz.
- ↑ Saussure, Voyages dans les Alpes, § 1225.
