File:The Quarterly journal of the Geological Society of London (1898) (14775793541).jpg

Identifier: quarterlyjourna541898geol (find matches)
Title: The Quarterly journal of the Geological Society of London
Year: 1845 (1840s)
Authors: Geological Society of London
Subjects: Geology
Publisher: London (etc.)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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several sarsens are shown. They hadnot, I think, been moved since they were uncovered : the gravel hadmerely been worked away from above them, and the edge of theworking is seen in the photograph behind the sarsens. As I have said, there is nothing to show that the sand on whichthese stones rest has not been re-arranged. I could find no sign offossil shells in the sarsens, so they may be a consolidated part of are-arranged bed, and I have no doubt that some sarsens are con-solidated gravel. I exhibit two specimens. The first, a fragment 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 ingravel on the east side of Chobham Ridges, 300 feet aboveOrdnance datum. Fig. 3.— Gravel-pit with numerous sarsens, Chobham Ridges^406 feet above Ordnance datum,.
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I do not suggest that the presence of sarsens at the bottom of thegravel is any evidence of ice-action ; but I now come to a case wherethe stone is actually in the gravel, and where it seems to me thatfloating river-ice would account for the state of things now to beseen. The pit which I wish next to describe is on Jackpond Hill, one ofthe western spurs of Chobham Ridges. The level is 360 feet aboveOrdnance datum. In April, 1891, T noted that this pit showed 5 to 6 feet oforange-coloured and red unstratified gravel. On July 19th, 1897,I visited the pit and found a better section open, showing that inparts the gravel is roughly stratified, but it also showed a greatdeal of contortion. In one place I saw a sarsen in the gravel, andwas able to photograph it. As it was partly buried, I cannot saywhat 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 notreached), and this was

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