south lancashire, cheshire, and the welsh border. j591 



Discussion. 



The President observed that the Author had made good use of 

 his opportunities as geological surveyor in the district, and had 

 brought forward facts which seemed to be of great value in their 

 bearing upon the two rival theories of glaciation. 



Mr. De Eance said that he had read a paper sixteen years ago 

 on the same district, and was glad to find that Mr. Strahan's results 

 agreed with his conclusions. 



He proposed to enlarge on a few points. He noticed, for instance, 

 that many of the old villages were built on those little sandy and 

 gravelly knolls which come up through the Boulder-clay. It might 

 be true that the sands and gravels were not so abundant in South 

 Lancashire as on the Welsh border, but in the neighbourhood of 

 Blackpool there are splendid sections showing two Boulder-clays 

 and a gravel series. When false-bedded the direction is S.S.E. 



As regards the discovery of flints in Boulder-clays, he mentioned 

 that in the neighbourhood of Blackpool Lias fossils, evidently from 

 Antrim, had been found in Middle Glacial gravels. All these clays 

 contained shells of the same species, but more broken than those 

 in the gravels. 



Dr. Hicks had examined portions of the district referred to, and 

 held the same opinion as the Author as to the origin of the striae. 

 In the caverns examined by him there was at the base a local drift, 

 then marine sands, and above all a Boulder-clay with ice-scratched 

 boulders from northern sources. 



The Author thanked the Society for the reception accorded to his- 

 paper. 



Q.J.G.S. No. 167. 2 s 



