OVERLYING ROCKS OF ROSS AND INVERNESS. 151 



at many points and found none that could be considered even partially 

 typical of the Glen-Docherty series. The limestone of Loch Kishorn 

 (note 32) is exactly like that which I have already described 

 near Strathcarron. It is frequently brecciated and generally of a 

 bluish or greyish colour. It is traversed also by cherty layers ; and 

 though fossils have not as yet been found in it, it seems altogether 

 so like that in which fossils occur at Durness that I believe they 

 may yet be discovered. The sandstones in association with the 

 limestone are also so exactly like those found in other areas that 

 they need not be referred to. They are in no part here more altered 

 than are the ordinary line-grained Torridon Sandstones of the typical 

 areas. Besides the schists to the east of the limestone mentioned 

 by Prof. JSTicol, I found, in the gorge through which the road to 

 Jeantown passes, a series of red augen-gneisses of rather a, peculiar 

 character, in. association with greenish -looking hornblendic schists. 

 A specimen of this augen-gneiss is described in note no. 12 by Prof. 

 Bonney. In ascending the hill eastward from this point, horn- 

 blendic schists with red felspathic lines and rather massive-looking 

 rocks of a green colour freely permeated by epidotic veins are the 

 prevailing types. At the crest of the hill and in descending to 

 Jeantown, reddish quartzose and other gneisses more approaching 

 the Ben-Pyn types are found, and the beds become on the whole 

 thinner and more contorted, a distinct reversed dip being found to 

 the south of Jeantown. Directly to the north of Jeantown, on the 

 shore of Loch Carron, the dark micaceous schist (note no. 11) Is met 

 with. These schists and the quartzose gneisses are found extending 

 along the shore to Loch Carron Kirk, from which point I ascended 

 the mountain Glas Bheinn, and their dip is generally eastward. 



In ascending Glas Bheinn until a height of about 600 feet is 

 reached the usual Ben-Pyn types of gneisses are found ; but beyond 

 this, and reaching quite to the top of the mountain, the hornblendic 

 gneisses described in note 11 are the prevailing types. Indeed the 

 central portions of the mountain and its shoulder to the west seem 

 chiefly to consist of these rocks. Numerous bands of a reddish fel- 

 spathic rock and segregation veins of felspar and quartz are also abun- 

 dantly present in the series. The whole aspect of these rocks to the 

 very top of the mountain calls to mind rather the older Hebridean 

 series than the Gairloch or Ben-Fyn types. Yet as the latter seem 

 to repose upon these on the east side they are for the present grouped 

 together. The strike of the beds is usually from N.W. to S.E. or 

 from that to ]N T . and 8. ; and the dip, generally high, is in some 

 places almost vertical. 



The presence of a group of gneisses of so old-looking a character, 

 and with a crystalline condition, as shown in microscopical sections, 

 not to be distinguished from the oldest gneisses of the Loch-Maree 

 type, reaching to the crest of a mountain of over 2300 feet in 

 height in an area regarded as containing the so-called newer Silurian 

 metamorphic rocks only, and east of the limestone series, is a fact of 

 enormous importance, especially as we are told by Murchison and 

 Geikie that the rocks found in this area are newer than the Lime- 



