576 Geological Socielj/: — The Rev. Prof. Buckland 



de Bagne, for example,) descend from the transverse, and extend 

 across the longitudinal valle}'s. Dr. Buckland mentions the mam- 

 millated, polished and striated slate rocks, about one mile above the 

 falls of the Tumel, on the left portal of the gorge of the valley, as 

 the effects of a glacier %vhich descended the gorge : lie notices also 

 the rounded outline and polish on veins of quartz, which project 

 eight or ten inches above the weathered surfaces of masses of mica 

 slate near the same locality. Similar mammillated masses of mica 

 slate retaining striae and flutings are visible at Bohaly, one and a 

 half miles east of Tumel Bridge. 



Evidences of Glaciers on SchiehaJlion. — The north and nortli-east 

 shoulders of the mountain present rounded, polished, and striated 

 surfaces, many of which have been recently exposed by the construc- 

 tion of new roads. On the left flank of the valley called the Braes 

 of Foss, and near the thirteenth milestone, a newly-exposed porphy- 

 ry dyke, forty feet wide, exhibited a polished surface and striated, 

 parallel to the line of descent which a glacier from Schiehallion would 

 take ; and on tlie right flank, one hundred yards north of the eleventh 

 milestone, another and smaller dyke of porphyry presented similar 

 phsenomena. In the intermediate space the recently uncovered slate 

 rocks and quartzite are rounded, polished, grooved, and striated, 

 parallel to the direction which a glacier would assume where each 

 surface is situated. 



Moraines at Tuymouth. — Two lofty ridges of gravel, which cross 

 the park at right angles to the sides of the valley between the vil- 

 lage of Kenraore and Taymoutli Castle, the hill, on which stands an 

 ornamental dairy-house, and the gravel, on which are situated the 

 woods overhanging the left bank of the lower end of Loch Taj', 

 Dr. Buckland considers to be moraines, or the detritus of moraines ; 

 also the deeply-scored and fluted boulders of hornblende rock, with 

 other debris near Fortingal, at the junction of Glen Moulin with 

 Glen Lyon. 



Moraines in Glen Cofield. — A remarkable group of moraines occurs 

 on the high lands which divide the valleys of the Tay and the Bran ; 

 and between the sixteenth and fourteenth milestones thirty or forty 

 round-topped moraines, from thirty to sixty feet high, are crowded 

 together like sepulchral tumuli. These mounds, composed of ixn- 

 stratified gravel and boulders. Dr. Buckland says cannot be referred 

 to the action of water, as they are placed precisely where a current 

 descending from the adjacent high lands would have acted with the 

 greatest velocity ; and they exactly resemble some of the moraines 

 in the valley of the Rhone, between Martigny and Lock. The vil- 

 lage of Amulrie is considered by the author to stand on a group of 

 low moraines ; and the road for two or three miles from it, towards 

 Glen Almond, to traverse small moraines or surfaces of mica slate, 

 rounded by glaciers. A few conical moraines appear also on the 

 high lands between Glen Almond and Crieff. 



Proofs of Glaciers in and near Strath Earn. — This j)art of the val- 

 ley of the Earn is flanked irregularly with ridges and terraces of 

 gravel, the detritus of moraines ; and on its north side, in the woods 



