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Some Boulders from the Chalk of Betchworth, Surrey

Published online by Cambridge University Press:  01 May 2009

I. S. Double
I. S. Double
Affiliation:
Department of Geology, The University, Liverpool.
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Extract

The presence of small quantities of detrital (terrigenous) minerals in the Chalk has been recorded from such widely-separated areas as Northern France (1), the Isle of Wight (2), Antrim (3), Mull (4), and East Anglia (5), but the discoveries of boulders in that formation appear to be restricted to the south-east of England. These records may be due to the greater extent of the workings in the Chalk of that area, and hence the greater frequency with which these “foreigners” are uncovered, or to some definite geographical conditions prevailing in Cretaceous times. The information available seems to prove that Betchworth has yielded more boulders than all other areas added together. In 1897, W. P. B. Stebbing (6) described two granitic rocks from that area. The present paper deals with a small collection of nineteen boulders made by the late Gerard Weedon Butler, also from Betchworth. Since these notes were first drafted the writer has been informed that a collection of something like 70 boulders, mainly from Betchworth, has been added since 1912 to those that were already in the Museum of Practical Geology.

Type
Original Articles
Information
Geological Magazine , Volume 68 , Issue 2 , February 1931 , pp. 65 - 71
Copyright
Copyright © Cambridge University Press 1931

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References

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