GLACIAL GEAVELS AT GLOPPA. 



89 



posit of Moel Trj'faen, 

 which contains a simi- 

 lar fauna of much the 

 same general charac- 

 ter, together with 

 striated erratics and 

 boulders/ 



They differ from the 

 middle sands and gra- 

 vels of Cheshire, Lan- 

 cashire, and Shrop- 

 shire, as described by 

 various observers,^ in 

 that they contain 

 numerous large and 

 small polished and 

 striated erratics, and 

 also in the general 

 character of the mol- 

 lusca, which have 

 thicker shells than the 

 Cheshire specimens. 



At the end of this 

 paper a list of the 

 fossils that T have 

 found in the drift is 

 given, all the species 

 of which, with the 

 exception of one or 

 two of the older fossils, 

 I have myself col- 

 lected. They occur 

 chiefly in the middle 

 and lower beds in 

 the fine shingle and 

 gravel, though they 

 are not uncommon in 

 the sandy layers. 

 Their condition varies 

 much : thus, there are 

 many fragments much 

 broken, rolled, and 

 striated, some very 

 fragmentary, but the 



^ See D. Mackintosh, 

 *Age of FJoating Ice in 

 North Wales,' Geol. Mag. 

 for 1872, p. 15. 



^ Cf. paper by W. 

 Shone on ' Glacial De- 

 posits of West Cheshire,' 

 Quart. Journ. Geol. Soc. 

 vol. xxxiv. (1878) p. 383. 



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460 



'540 



390 



Koad. 



Old 

 Oswestry. 



Road and 

 Eailway 



