Geological Notes from VVest Galway. 



159 



^he veins D are in part very fine-grained, approaching the 

 character of eurite. West of the mass just described, there is 

 an outburst of granite similar to that in the last described 

 cutting, but not containing garnets. 



Fig. 3. 



In the other cuttings along the lake, there are coarse horn- 

 blende schists, composed of lenticles of hornblende closely 

 packed in a felsitic matrix. There are are also veins of coarse 

 granite with large hornblende crystals, apparently picked up 

 from the schist. In the rock excavated from one of these 

 cuttings a portion of a granite vein was found, in which the 

 mica flakes were all arranged with their planes perpendicular 

 to the walls of the vein. There are also some soft green schists 

 almost entirely composed of mica, a species of schist very 

 common in the cuttings west of Recess. 



In the lower portion of Cloonloppeen stream, a little above 

 the road, some remarkable pot-holes may be seen. Of two 

 large ones close together, one contained a single large stone 

 over a foot in diameter, and the other a great number of 

 small stones about one inch in diameter. 



Cuttings about Boheshai.. 



West of Cloonloppeen Bridge is a cutting in hornblende 

 schist. In this may be seen a granite vein with hornblende 

 crystals. Here also a vein of handsome fresh-looking garnet- 

 rock was cut through : it is, however, altered, with the forma- 

 tion of calcite and pyrite. As it lay nearly in the line of the 

 cutting, only a small portion is now to be seen in situ ; this is 

 near the west end, low down on the left side. On the right 

 side what may be a continuation of the vein is seen in a boss 

 of hornblende schist, if the latter is indeed i7i situ. The vein 

 appears to have been hollow in places, with well-formed garnet 

 crystals lining the cavities. Professor Cole, who examined 

 a specimen under the microscope, finds it to be a pyroxene- 



