502 



EEV. A. lEYIXG OX A GE2fEEAL SECTION' OE TKE 



Fig. 3. — Section across the Valley of Aldershot Toiun. 



(Greatlv exaggerated vertically.) 



8. " X. 



Aldershot Town Cambridge Thorn Hill. 

 Eed Hill. and Station. Hospital. 



1. Diift graxel, chiefly of subangular discoloured flint lying on a deeply eroded 



surface of 



2. Upper Bagshot Sands, with predominant colour buff-yellow. 



3. Bed of well-rounded flint pebbles. 



4. Yellow and brown Icam and loamy sand, with numerous layers of pipe- 



clay, occasionally several inches in thickuess. 

 L.C. London Clay. Occasional flint pebbles and shark's teeth are met with in 

 the clay -pits in the neighbouring brick-fields. 



than reconstructed clay of the Eeading Beds, is present here in a 

 considerable mass several feet in thickness, intercalated with the 

 green sands. Above the rifle-butts a section of the Upper Sands 

 shows a dip of 2"^ south ; and in a section on the southern side of 

 the hill I measured a dip of 8° south. The hill-cap also slopes 

 about 2° to the south. The Middle Bagshot beds exposed at the 

 rifle-butts pass not only through Caesar's Camp, but through Hungry 

 Hill also, which has somehow got mapped as Loiuer Bagshot. This 

 hill is 550 feet bigh, the sections about its upper part, down to 

 about 350 feet, show Upper Bagshot Sands like those of the upper 

 200 feet of Caesar's Camp, and springs come out at about 350 feet 

 level. At about this level, on the southern slope of Hungry Hill, 

 in the village of Upper Hale, the water-bearing horizon at the base 

 of the Upper Sands is proved in two wells, one of which begins at a 

 height of about 450 feet and is 114 feet deep, while the other 

 begins at a height of 400 feet or so and is bQ feet deep. This 

 information was given me by the man who was engaged in digging 

 them. A little way further down the hiR the " blue clay " was 

 penetrated at a depth of about 2o feet. These facts do not 

 harmonize with the details of fig. 89, p. 376 of the Survey Memoir, 

 and they are still more discordant with the mapping, which repre- 

 sents the Middle Bagshot beds as cropping out on the eastern flank 

 of Caesar's Camp, where a drift-clay deposit lies upon the slope of 

 the hill ; it is to be seen at the rifle-butt filling an eroded hoUow 

 in the Middle Bagshot beds, which are as nearly as possible hori- 

 zontal, instead of lying at a high angle, as the mapping would 

 require. This clay is as unstratified as any Boulder-clay, and 

 bricks were made from it rather more than 20 years ago at a height 



