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Partial silicification of chalk fossils from the Chilterns

Published online by Cambridge University Press:  01 May 2009

G. Brown ,
J. A. Catt ,
S. E. Hollyer  and
C. D. Ollier
G. Brown
Affiliation:
Pedology Department, Rothamsted Experimental Station, Harpenden, Herts.
J. A. Catt
Affiliation:
Pedology Department, Rothamsted Experimental Station, Harpenden, Herts.
S. E. Hollyer
Affiliation:
Geology Section, Science Department, Luton College of Technology, Luton, Beds.
C. D. Ollier
Affiliation:
Earth Science Department, University of Papua-New Guinea, Boroko, Territory of Papua and, New Guinea.
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Summary

The calcite of brachiopod, lamellibranch and echinoid shells from the Upper and Middle Chalk of Hertfordshire and Bedfordshire is partly replaced by chalcedonic silica. The crystallographic forms of the silica are described, and its diagenetic emplacement inferred from thin section studies.

Type
Articles
Information
Geological Magazine , Volume 106 , Issue 6 , December 1969 , pp. 583 - 586
Copyright
Copyright © Cambridge University Press 1969

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References

REFERENCES

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