612 MESSES. GAEDNER, KEEPZffG, AJSD MONCKTON OK THE 



a little to tlie east. There is a pit in nearly white Upper Bagshot 

 sand close to an arch under the railway (26) from which llr. Herries 

 has also obtained fossils. 



At Bakersgate Earm pebbles abound on the surface of the ground, 

 showing that there is no more Upper Bagshot in that direction. 



The Bagshot Beds, which are usually fairly horizontal, rise 

 sharply to the south as we approach the Chalk (Mem. Geol. Surv. 

 vol. iv. p. 376, fig. 89), so that the base of the Upper Bagshot, 

 which is but little over 200 feet above ordnance datum at !N"orth 

 Camp Station, S. E. E., has risen to 300 feet at Thorn Hill (29) 

 and to more than 560 feet at Caesar's Camp (Q. J. G. S. vol. xliii. 

 pp. 431, 440). 



Near Earnborough Station, S. W. R., there are good sections in 

 the Upper Bagshot yeUow sand in a railway-cutting (28) and in 

 road-sections, and the same beds were recently exposed in digging 

 the crypt for the Imperial Mausoleum. Eossils are recorded from 

 these sections (Mem. Geol. Surv. vol. iv. p. 334 ; Q. J. G. S. vol. xli. 

 p. 500). 



In a well at the Earnborough waterworks pebbles were reached 

 at 1351 feet and 153^ feet below the surface, and above the upper 

 pebble-bed were 128^ feet of loamy sand (Q, J. G. S. vol. xli. 

 p. 495). 



At Thorn Hill, South Camp, xildershot, are shallow fortifications 

 and a sandpit at the top of the hiU (29). All are in 5 ellow Upper 

 Bagshot sand, and in one Mr. Hemes found a cast of a bivalve. 

 The pebble-bed crops out 62 feet below the top of the hill (Q,. J. 

 G. S. vol. xlii. p. 410, vol. xliii. p. 431). Its exact limits in the 

 Long Yalley have not been worked out; but Lieut. Lyons says 

 that the Brackiesham beds can be traced across the valley, overlain 

 occasionally by the Upper Bagshot with the pebble-bed at its base 

 (Q. J. G. S. vol. xhii. p. 439). 



Mr. Herries has found casts of shells in abundance * in yellow 

 Upper Bagshot sand at the steeplechase-course (30) near Long Hill. 

 We have a single valve of a large shell, probably a Cardium, and 

 other fossils, from the same bed at Beacon Hill (31). 



At Gaily Hill, named Curley Hill on the Geological Survey Map, 

 though the whole is mapped Brackiesham, there is the following 

 section in Upper Bagshot in a sandpit (32) : — 



ft. in. 



1. Nearly white sand, with a little white clay in very small patches, 



and numerous green grains 6 



2. Dark yellow sand, with about as much clay 4 



3. White and orange-coloured sand 2 



4. Line of pebbles in yellow sand. 



The beds 1 and 2 contain casts of shells. On the opposite side 

 of the hill and at a rather lower level the Brackiesham claj's are 

 worked for bricks. In the Hartford Bridge Elats outlier there are 



* 1 specimen of Bentaliiim, 6 of Xenophora, and 23 other specimens of uni- 

 valves, 4 bivalves. 



