VOL. xvii. (2) NORTH AND MID COTTESWOLDS 269 



Mammalian remains occur in great numbers in the drifts 

 of the Avon Valley. Buckland describes a remarkable collec- 

 tion of bones in a cavity in the Lias at Little Lawford, now long 

 since worked out.' 



Lucina borealis, Turritella, Anomia., Cardium and Rissoa 

 are recorded as having been found at Beckford, 120 feet O.D./ 

 and a doubtful fragment of Cyprina at Berry's Coppice, Dun- 

 nington, 280 feet O.D.^ 



An advance of ice from the north into the Avon Valley is 

 supposed to be indicated by the presence of rocks of northern 

 tyi^e on the summit of Welcomb Hill, near Stratford-upon-Avon 

 300 feet above O.D. A careful search, ho\yever, in the gravel 

 pit at that place leads me to the conclusion that the whole of 

 the drift material consists of pebbles of the Bunter type and 

 much weathered flints, not necessarily ice-borne. 



V. — Origin of the Drift 



Permian breccias and conglomerates occur near Enville in 

 Staffordshire and at Gatacre in Shropshire, on the flanks of the 

 South Staffordshire Coalfield, at the south end of the Warwick- 

 shire Coalfield, and in certain other places. Bunter Pebble- 

 Beds are present in the Lickey and Clent Hills, and extend 

 almost without interruption from Romsley (928 feet) to Can- 

 nock Chase on the west of the Staffordshire Coalfield, to 

 Lichfield on the east. 



Most of the Drift of the area under consideration could 

 have been derived from these rocks,^ which contain sub-angular 

 and rounded pebbles, varying in size from half an inch to 

 eighteen inches across, and they include yellow, brown and 

 liver coloured quartzites, vein quartz, sandstones, chert, lime- 

 stone with encrinites, slate, lydian stone and various igneous 

 rocks, together with varying proportions of loose sand.* 



Some of the worn constituents of the gravels may have 

 been derived from a conglomerate similar to that in the Lower 

 Greensand at Swindon. 



I Reliqu Diluv p. 174 and 176. See also Wilson, Quart. Journ. Geol. Soc, vol. xxvi , 

 PP-201-2, and Lloyd, Quart. Journ. Geol. Soc, vol. xxvi., p. 216. Strickland, Memoirs by Jardine 

 Sn^^;, fi a :,' P.-. |5 ; Bird, ibid vol. iii., p. 255 ; Lloyd, Quart. Journ. Geol. Soc, vol. xxvi., 



pp 209 10 ^"°"^^' Severn Straits," p. 35. 3 Lloyd, Quart. Journ. Geol. Soc, vol. xxvi.^ 



tOEethe^r^witi?f^°* ^"",''"''^°'^?u "ifterials collected by me for the purposes of this inquiry will, 

 together with a map, be placed in the Cheltenham Public Museum. 



on L fin w "SJ-TL'' ^"^'..Watts " A Sketch of the Geolo^- of the Birmingham District " (1907) 

 pp. 59-60 : W. Wickham King, 2 Quart. Journ. Geol. Soc, vol. Iv. pp 97-128 



