OVERLYING ROCKS OF ROSS AND INVERNESS. 



145 



Prof. Bonney*. They include coarse and fine-grained granitoid 

 gneisses containing garnets and sphene, a well-marked augen-gneiss, 

 dull-coloured and bright silvery mica-schists containing abundance 

 of garnets, and micaceous gneisses with bands of white and black 

 mica, with a moderate amount of quartz, felspar, &c. 



On the south side of Loch Eoshk the same characteristic gneisses 

 and mica-schists appear, and with a similar strike. 



No. 5 is typical of the series in the shoulder of the hill between 

 the east end of Loch Eoshk and the valley to the south towards 

 Glen Carron, which the Dingwall and Skye Railway traverses. To 

 the east of the railway the rocks are also highly typical of the Ben- 

 Fyn series. They lie at a high angle with an easterly dip. Here 

 and there contortions are recognizable ; but the only very definite 

 change in the dip observed was in the mountains south of Loch 

 Luichart f . In this area, as in the Ben-Fyn group of mountains, the 

 degree of alteration is equal throughout from the base of the series 

 to the top ; and that the metamorphism cannot be due to any local 

 mechanical disturbance is perfectly clear from the evenly bedded 

 character of the majority of the rocks. In every specimen examined 

 an intimately crystalline condition was observable, such as is usually 

 considered characteristic of the true gneisses and schists ; and gene- 

 rally also the minerals sphene and garnet, which could not have been 

 originally present in the sediments, occur in abundance throughout 

 the rocks. 



4. Ben Eay and Loch Clare to Glen Carron (fig. 1). 



This section is taken in a line nearly due south of one described 

 in my previous paper. It illustrates the general order of succession 

 to the south of Loch Maree, whilst the former indicated the 



Kg. 1. — Section from Ben Eay by Lochs Clare and Coulan to the S.E. of Glen Cai 



(Scale | inch to 1 mile.) 

 r.w. 



S.E. 



Faults. 



Loch Coulan 



Glen Carron. 



c, c. Gairloch and Ben-Fyn series. 



e. Limestone series. 



d. Torridon Sandstone. d\ Quartz rock. 



/. Glen-Docherty series. 



order on the north side. As previously mentioned, the fault along 

 Loch Maree has thrown down the floor and the overlying beds on 

 the south side to a much lower level ; and in consequence the old 

 floor is lost further westward than on the north side. The diffi- 



* Quart. Journ. Geol. Soc. vol. xxxvi. p. 03. 

 t It is also mentioned by Murchison as occurring in Ben Eigen 



