1 894-9 5.] Geological Notes from Arran. 121 



however, does not appear to have been altered to the extent 

 one might have expected. 



On the shore, just opposite Corrygills, there stands an 

 immense boulder of granite, estimated to weigh 210 tons, 

 which has been brought by glacial agency from the Goat Fell 

 district, the granite of which it is composed corresponding 

 exactly with that of the place indicated. Numberless other 

 boulders of granite, though for most part of small size, de- 

 rived from the nucleus, are to be seen scattered about every- 

 where. 



Very few fossils have been found in the sandstones and 

 conglomerates of the shore. Mr Bryce states that he was for- 

 tunate enough to discover a rather fragmentary specimen of 

 orthoceras, the species of which he was unable to determine. 

 I spent half a day specially hunting for fossils in this district, 

 and searched all the spots I considered likely to turn out 

 productive, but without an atom of success. 



We will now for a short time transfer our sphere of oper- 

 ations to Glen Eosa. The walk to this place is one of the 

 prettiest in Arran, and the prospect on all sides, to quote the 

 words of a poet whose writings have been a good deal before 

 the public of late, " Most beautiful to be seen." On the way 

 we pass close to Brodick church, a small edifice almost buried 

 from sight in a wood. Under the north wall of the church- 

 yard there occurs a band of limestone, which, however, has 

 been almost wholly removed by quarrying operations. In the 

 remaining portion I found, after half an hour's search, a small 

 specimen of Pinna flabelliformis. 



Besuming the journey to Glen Eosa, we pass over the 

 upturned edges of the Lower Old Bed Sandstone series and 

 then on to the metamorphosed slates. This rock is well ex- 

 posed in the bed of Glen Bosa Water, and appears to be consid- 

 erably hardened even at a good distance from the granite. 



At a point less than 100 yards below the confluence of the 

 Garb Allt with Glen Bosa Water is to be seen the junction be- 

 tween the granite and the slates. The exposure is in the bed 

 of the stream, and is not now so obvious as it was. The 

 actual junction is much obscured by debris, and I could not 

 find a spot where the granite in mass could be seen in close 

 contact with the slates, though I waded about for a couple of 



