Yol. 54.] 



OF THE BAGSROT DISTRICT. 



189 



weighing a little over 500 grammes, was given to me by Prof. 

 Rupert Jones, F.E.S., and contains subangular flints, flint-pebbles, 

 and small quartz-pebbles. The second is a fragment of a pebble 

 (145 grammes) and contains small chips of flint: I found it in 

 gravel on the east side of Chobham Ridges, 300 feet above 

 Ordnance datum. 



Fig. 3. — Gravel-pit with numerous sarsens, Chobham Ridges^ 

 406 feet above Ordnance datum,. 



I do not suggest that the presence of sarsens at the bottom of the 

 gravel is any evidence of ice-action ; but I now come to a case where 

 the stone is actually in the gravel, and where it seems to me that 

 floating river-ice would account for the state of things now to be 

 seen. 



The pit which I wish next to describe is on Jackpond Hill, one of 

 the western spurs of Chobham Ridges. The level is 360 feet above 

 Ordnance datum. 



In April, 1891, T noted that this pit showed 5 to 6 feet of 

 orange-coloured and red unstratified gravel. On July 19th, 1897, 

 I visited the pit and found a better section open, showing that in 

 parts the gravel is roughly stratified, but it also showed a great 

 deal of contortion. In one place I saw a sarsen in the gravel, and 

 was able to photograph it. As it was partly buried, I cannot say 

 what its full size was, but the exposed part measured 3x 1| feet. 

 It lay with an inclination to the south-east. 



Below the stone 4 feet of sandy gravel was exposed (bottom not 

 reached), and this was irregularly but distinctly stratified. Above 



