410 messes. h. w. molitckton and r. s. heeries 



The Aldeeshot District. 



We now pass over to the Aldershot district, and here we admit 

 that at first sight the theory propounded by Mr. Irving appears 

 somewhat plausible. 



The hill east of the South Camp, known as Thorn Hill, and on 

 which the Cemetery aud the Cambridge Hospital are situated, sends 

 out at its eastern end two spurs. On the N. E. spur a fort has been 

 constructed, and the trenches that have been dug have penetrated 

 through the capping of gravel to the loose yellow sands of Bagshot 

 age. These sands contain small irony concretions, like those de- 

 scribed (Geol. Mag. dec. ii. vol, viii. p. 171) as occurring in the Upper 

 Bagshot sands at Tunnel Hill. Here one ofus was fortunate enough 

 to find a bivalve shell, which established in our minds beyond doubt 

 that the sands belonged to the Upper Bagshot. In the S.E. spur, 

 just west of the Cemetery, there is a sand-pit showing a good section 

 of brown and yellow sands bedded in rather wavy lines, but not 

 false-bedded. There are no clay bands, but little white patches of 

 clayey sand. These beds show a decided dip rather north of east — 

 that is, in the direction of the main mass of the Upper Bagshot as 

 exposed in the Fox Hills. 



East of the Cemetery on the lower hill, just below the fort already 

 mentioned, and just west of the Commissariat Stores, a small opening 

 shows very finely banded white and brown sands, false-bedded, 

 with large ferruginous concretions containing wood in abundance. 

 The sands contain clay patches. Close by there is a mass of pebbles 

 in situ, imbedded in a greenish rather clayey sand. This bed is 

 about 3 feet thick, and is seen to overlie the sand bed. This pebble- 

 bed we attribute to the Middle Bagshot, and we think that though 

 the dark green sand beds do not appear, that is only for want of a 

 good section. The ferruginous concretions with wood are very cha- 

 racteristic of the Lower Bagshot Sands, but also occur in the Middle ; 

 and it would be difficult, from such a small exposure, to say to 

 which of those two divisions the false-bedded sands underlying the 

 pebbles should be referred. The surface of the ground between the 

 last described section and the base of the N.E. spur is covered with 

 pebbles, and we traced them all round the south side of the hill to 

 the Cambridge Hospital, but no further section of them is seen *, 

 though, judging from the way in which they cover the hill slope, 

 they must belong to a thickish bed. Just below the " C " in Cemetery, 

 in the new one-inch map, there is a small pit, a few feet below the 

 upper limit of the pebbles, showing yellow sands with irony concre- 

 tions, of Lower Bagshot type. 



Crossing over the valley to Eedan Hill, we find an exposure behind 

 the Artillery Stores, of about 20 feet of false-bedded white sands, 

 with irony concretions containing wood. These sands are clearly 



* The pebbles are exposed in two road-sections near the top of the hill west 

 of the Hospital, and the Middle Eagshot green-sand bed and underlying clays 

 are well shown in a section west of the FarnhamEoad in the western extension 

 of the same hill. 



