20 MR. T. P. JAM1ESON ON THE [Feb. 1906, 



rock there, however, is being quarried away, so that ere long they 

 may disappear. These markings are at the top of the cliff, and 

 are covered by red Boulder-Clay, at an altitude of 100 feet above 

 the sea. 



The glaciation of the rocks along the coast of Slains, Cruden, 

 and Peterhead seems to have been so slight as to be scarcely 

 observable. Perhaps the ice was not very thick, or was buoyed up 

 by the water which submerged the coast at that time, or it may 

 have had little motion. The granite below the grey Boulder-Clay 

 at Peterhead shows a like absence of glaciation. At the Govern- 

 ment Quarry, on the west side of Stirling Hill, the rock, when 

 newly uncovered, does show indications of abrasion by an agency 

 coming from south or south-east, but I could find no undoubted 

 scratches or scoring by the ice. 



III. Helation of the Chalk-El i nts to the IIed Clay. 



In the patches of lied Clay found sporadically on the top of 

 Stirling Hill and the adjoining eminences, fragments are common of 

 the crystalline schists, which form the rocky coast of Slains and 

 Cruden lying to the south-cast at a lower level. This shows that 

 there had been an upward transport over tho hill from that quarter 

 during the time of the lied Clay. All this harmonizes with tho 

 general bearing of the evidence formerly detailed. 



More interesting evidence, however, is derived from the distri- 

 bution of the Chalk-flints which cover the ridge running inland 

 from the sea atBuchan Ness. These flints lie generally thickest on 

 the top of that ridge, but extend also down both sides of it. I 

 find, however, that for about 2 miles inland from the coast they have 

 been swept off, apparently by an agency moving across the ridge 

 from south to north. The end of the ridge next the sea is called 

 Stirling Hill, tho adjoining summit to the west is called the Hill of 

 Longhaven, and the next Coldwells. They are all composed of red 

 granite, and rise to a height of about 300 feet above the sea, 

 forming a continuous ridge : the last-mentioned portion attaining 

 an altitude of 329 feet, which is the highest summit. All over tho 

 southern slope of these heights the flints are entirely absent, 

 and on the top and eastern end of Stirling Hill the same is nearly 

 the case. On the top of Longhaven Hill a stray flint or two may 

 be found, and they become more numerous as we approach the 

 northern brow of the ridge, but on descending the north side they 

 immediately become plentiful ; while, in the Den of Boddam, which 

 is a little, narrow, winding ravine running along the north side of 

 Longhaven Hill, they lie in vast profusion. The same is the case 

 on the farm of Sandford Hill, on the north side of the Hen. All 

 over this space the flints lie thicker than I have seen them in any 

 other part of Aberdeenshire, or, indeed, of Scotland, forming in some 

 places large mounds known as the Saddle Hills. 



Blocks of granite, some of them 4 to 6 feet long, lie on the top of 

 the flints along the northern shoulder of the Longhaven ridge, as if 



