250 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 22, 



was completely filled up, and so remains to this day, the stream 

 which traversed it having found another outlet. Here the Cangaua 

 spreads out into broad sheets nearly a quarter of a mile across. 



3. On the Discovery of Flint Implements in the Drift at Milford 

 Hill, Salisbury. By H. P. Blackmore, M.D. 



[Communicated by John Evans, Esq., F.E.S., E.G.S.] 



(Abridged.) 



Since the discovery of flint implements in the higher -level gravel 

 at Fisherton, on the west of this city, an interesting account of 

 which was given by my friend John Evans, Esq., in a valuable paper 

 published in the August Number of the Society's Journal, a second 

 discovery of a large number of very excellent weapons has been 

 made in the drift-gravel of Milford Hill, a deposit of the same age 

 as the Fisherton Beds, but situated on the opposite side of the Avon, 

 immediately to the east of Sahsbury. In the Ordnance Map the 

 name of Milford Hill has been erroneously applied to what is known 

 on the spot as Cricket Down, Milford Hill proper being a continua- 

 tion of Mizmaze Hill. 



The gravel in which these implements are found is composed of 

 the ordinary subangular chalk-flints, a few well-rolled Tertiary 

 pebbles, some small blocks of saccharoid sandstone, also of Tertiary 

 origin, and a much larger percentage of fragments of Greensand 

 chert than occurs in the gravel at Fisherton. AU these materials 

 are blended with a variable proportion of sand and stiff clay, and 

 are stained pretty uniformly of a dark-ferruginous colour. Many 

 of the chalk-flints are of large size, with sharp, well-defined angles, 

 and present scarcely any marks of violent roUing or water-wearing. 



When we look at any of the sections of chalk in this neighbour- 

 hood, and remark the comparatively few and widely scattered bands 

 of nodules, we feel that one can barely form an adequate notion of 

 the immense bulk of chalk which must have been denuded and 

 disintegrated to produce these large accumulations of flint-gravel, 

 or form any approximative idea of the vast period which such a 

 gradual process must have involved. 



The drift at Milford completely invests the summit of the hill. 

 It is thickest at the top, where it attains a thickness of from 10 

 to 12 feet, thins out gradually on the sides, and ceases altogether 

 rather more than halfway down. It is quite free from anything 

 approaching stratification, rests unconformably upon the Chalk, 

 running down in many places into shallow pot-holes, and attains 

 a height of about 100 feet above the present level of the river 

 Avon. The position of the gravel is interesting and of consider- 

 able importance. 



Milford Hill is a low chalk spur, placed immediately above the 

 point where a small stream called the Bourne joins the river Avon, 



