The Glacial Theory, 



137 



and detached masses of rocks, which skirt several mountains 

 in Dumfrieshire, Aberdeenshire, Forfarshire, and other 

 parts of Scotland, generally, if not always associated with the 

 foregoing polished and striated surfaces, so as to leave little 

 doubt upon the mind, that both phenomena were produced 

 by the same cause. 



Dr. Buckland considers the gravel and sand which cover 

 most of the granite table-land from Aberdeen and Stone- 

 haven to be the detritus of moraines ; and the large tumuli 

 and tortuous ridges which occupy one hundred acres near 

 Forden to be terminal moraines, as well as the blocks, large 

 pebbles and small gravel spread over the levels of the valley 

 of North Esk, after emerging from the lower Grampians, to 

 be the residue of moraines, re-arranged by water. 



The cones and ridges of gravel in Forfarshire near Kirrie- 

 muir at the confluence of the Caritz and Proson valleys, have 

 also been produced, Dr. Buckland considers, by glaciers. 

 The vast longitudinal and isolated ridges extending for two 

 or three miles up the valley of Blair GowTie, and the trans- 

 verse barriers forming a succession of small lakes in the 

 valley of Savanburn, he considers to be moraines^ as well 

 as the lofty mounds forming the ornamental grounds adjacent 

 to Dunkeld Castle; and the detritus covering the left flank of 

 the valley of Tay are, he thinks, to be ascribed to the same 

 cause, as well as the vast congeries of gravel and boulders 

 on the shoulder of the mountain exactly opposite to the gorge 

 of the Tamel. " These last were precipitated from glaciers 

 which descended the lateral valley of the Jamael, on the 

 north side of Schihallien and the adjacent mountains. 



Remarkable groups of tumuli, thirty to sixty feet high, are 

 crowded together on the highlands dividing the Tay from the 

 Brau, which exactly resembles some of the moraines in the 

 valley of the Rhone, between Mortigny and Lock. The 

 village of Almurie is considered by Dr. Buckland to stand 

 on a group of low moraines and surfaces of mica slate round- 



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