VOL. XVII. (2) NORTH AND MID COTTESWOLDS 259 



(2) From Mid Wales into Central Herefordshire, not far 



from the gap between May Hill and the Malverns ;' 



(3) From the Brecons nearly to the shore of the Bristol 



Channel ;^ and 



(4) From the Vale of York and Doncaster district and 



Scandinavia.^ 



There does not appear to have been any intrusion of these 

 ice-sheets into the Cotteswold area except, perhaps, the northern 

 flanks and the Vale of Moreton.* 



II. — Classification of the Superficial Deposits 



The Drift and other Superficial Deposits of the district 

 under consideration may be classified a? follows : — 



(i) Scattered Drift pebbles, principally of quartz and 

 quartzite, together with artificially flaked flints, 

 found at all elevations. 



(2) Drift pebbles and unflaked flints found below about 



700 feet ; 



(3) Gravels composed mainly of Jurassic debris, with sands, 



seams of clay and a great variety of Drift pebbles 

 and rock-fragments (including red and white chalk) 

 unworn flints, and a few large boulders. These 

 occur between about 550 feet and 300 feet above 

 ordnance-datum. 



(4) Gravel formed of small fragments of Jurassic rocks 



without Drift pebbles, at various elevations below 

 1000 feet. 



Note. — In addition to the above, Lucy and others have in- 

 cluded among the Drift Deposits, certain clayey and arenaceous 

 soils now known to have been derived from the weathering of 

 " solid " rocks. 



1 Proc. Cottesw. Nat. F.C., vol. xv., pt. 3, pp. 196-7 ; T. S. Aldis, H. C. Moore, H. E. Grindley 

 and L. Richardson, Trans. Woolhope Nat. F.C. (1866), pp. 253-4 ; (1870), pp. 173-7 ; (1877), pp. 20-22 ; 

 (1902-4), pp. 228 and 325-36 ; (1905-7), pp. 60-67, 163-8 and 194. 



2 Prof. Edgworth David, Trans. Cardiff Nat. Soc, vols. xiii. and xiv. See also Quart. Journ. 

 Geol. Soc, vol, x.\.\ix., pp. 39-54 ; Dr .A. Strahan, Suinmr. Progr. Geol. Surv. for 1897-99 and 1901 ; 

 Rep. Brit. Assoc, Winnipeg (1909), p. 475 ; F. T. Howard, " Notes on Glacial Action in Brecknock- 

 shire," pp. 38-9 and 40. 



3 P. F. Kendall, Quart. Journ. Geol. Soc, vol. Iviii., pp. 495-6. 



4 W. J. Harrison, " Geol. Birmingham District," p. 94 ; H. B. Woodward, Geol. Mag. (1897), 

 P- 485 ; F. W. Harmer, Quart. Journ. Geol. Soc, vol. Ixiii,, pp. 471., 489 and 500 ; S. S. Buckraan, 

 Proc. Cottesw. Nat. F.C, vol. xiv., p. 115. 



