BAG8H0T STRATA FEOM ALDEESHOT TO WOKINGHAM. 495 



No. 6. The rapid thinning-out of this pebble-bed was proved two 

 years ago in an excavation made for a rain-water tank for the 

 College Laundry. It was only 1| feet thick there. In the neigh- 

 bouring railway-cutting it has dwindled to a mere layer of pebbles. 



No. 8. Small fragments of shells occur in this bed, which occupies 

 the same horizon as that in which very complete specimens of 

 Cardita &c. were found last year, in the well at Yateley Green, 

 described below. 



No. 9. The uppermost 6 inches of this bed show the green sand 

 of the bed above, coarsely mingled with the clay ; the next three 

 feet consist oi pure pipe-clay. Then, for about three feet, the clay 

 is distinctly laminated and coloured with carbonaceous matter. 



No. 10. This is a very homogeneous clay-bed, much stained with 

 carbonaceous matter. 



No. 12. This bed is slightly more loamy than No. 11. The speci- 

 mens preserved have assumed a somewhat browner tint, as the 

 result of oxidation during the last 2b years, from the presence of 

 more iron in the material which coats the grains. The specimens of 

 these two beds (11 & 12) have precisely the character assumed by the 

 grey and greenish sands after long exposure to atmospheric oxygen. 



No. 13. The clay of this bed is exactly like that of No. 10. 



No. 14. The uppermost 25 feet of this bed are strongly lami- 

 nated ; the remaining 10 feet pierced have more the character of 

 London Clay than of anything else. Here, then, we seem to find a 

 'passage of tlie London Clay into the Bagsliot Sands. 



(2) Farnhorough Beep Well. — At the southern end of the parish, 

 a new weU was sunk last year by Messrs. Tilly and Sons for the 

 District Waterworks. Prom the information furnished to me, and 

 from inspection of the works, I have constructed the following 

 section. The elevation of the mouth of the well above O.D. level 

 is 250 feet. 



ft. in. 



1. Gravel (mixture of pebbles and suban- 



gular flints) of later drift 7 



2. Yellow loamy sand 33 



3. Yellow sand, yielding water 33 



4. Yellow loam 8 



5. Greyloam 12 



6. Grey sand, yielding water 29 



7 . White-grey sand , yielding water 13 6 



f 8. Strong brown clay, pebbles at the top ... 9 



Middle Bag.ho,3iift.j ^,^^:::,:,,i^:::::z:::z:::::, 'I ? 



1^11. Green loam and pebbles 10 



12. Green loam and sand 22 



13. Green sand yielding water 22 



14. Green sand with thin layers of clay...... 3 



15. Strong green loam 12 



16. Green sand and Avater 3 



17. London Clay penetrated to 31 



I am greatly indebted to Mr. Whitaker for additional notes made 

 from examination of the specimens, and his grouping is here 

 followed. 



Upper Bagshot, 128^ ft. 



Lower Bagshot, 62 ft. 



