Vol. 50.] CRYSTALLINE SCHISTS IN THE LEPONTINE ALPS. 



293 



phyllites, sometimes calcareous. The vertical distance from the 

 base of the gneiss to the road is about 550 feet. 



Fig. 2. — Section at the hack of the village of Realp, in the ravine. 



1 = Micaceous gneiss. 



2 = Dark limestone (70 feet), 



dipping 20° N.W. 



2' = The same, with greyish phvl- 

 lite (40 feet). 



x 1 = Covered ground (about 60 

 feet). 



3' = Thinly-bedded, dull-coloured 

 limestone (?), 12 feet. 



3 = Marble, 30 feet, dipping 



40° N.W. 

 x 2 = Covered ground. 



4 = Phyllite, etc., about 120 feet. 

 a' 3 = Covered ground. 



7 = Hospenthal schists. 



(The measurements were made by Mr. J. Eccles, F.G.S.) 



(f ) Section between the Galenstock and Tiefenhach Hotels. — After 

 Realp is left, the road to the Furka Pass ascends much more rapidly, 

 at first over Hospenthal schists, but at a distance of rather more 

 than 1\ mile 1 it crosses obliquely the Jurassic belt. First comes a 

 little rauchwacke, which appears to occur in interrupted patches; 

 then rocks of the usual Jurassic type succeed, phyllites dominating in 

 the lower part, with quartzose bands towards the base, and the dark 

 lead-coloured limestone in the upper part. Beyond these comes a 

 brownish schist, more like one of the Hospenthal group than the 

 ordinary gneiss, which, however, is presently cut by the road. In 

 this section, which is generally very well exposed, I did not see any 

 sign of the marble. 



(g) Sections at and near the summit of the Furha Pass. — The road, 

 after passing for a distance of rather less than 2 miles over gneisses 

 and schists, into the details of which it is needless to enter, returns 

 to the sedimentary rocks. These, however, can be seen running 

 along the slopes below in a broad unbroken belt from the last- 

 described section up to the top of the pass, which is still a good 

 three quarters of a mile away. 2 We worked in 1891 across this 



1 This is as measured on the map, not as reached by path or road. 



2 The road to it keeps near the northern edge of the belt, once quitting it 

 for a very short distance. 



