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V.—On Certain Lithodomous Perforations in Derbyshire1

Published online by Cambridge University Press:  01 May 2009

Extract

In the GeologicalMagazine for 1870 (Vol. VII., p. 267), I published a brief account of some burrows in Derbyshire; one group of. which, at the bottom of Miller's Dale, and on a scarp of rock which was probably artificial, appeared to me wholly irreconcilable with the theory which attributes them to the action of Pholades.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1872

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Footnotes

1

Read before the Cambridge Philosophical Society, April 29, 1872.

References

page 316 note 1 See a similar case described by Mr. Rofe, Geol. Mag., Vol. VII., p. 5.

page 317 note 1 For example, during a brief visit to Cheddar last July, I did not come upon quite the right kind of rock, and only found two or three burrows—and these in a boulder—that satisfied me. It will not, however, surprise me if they are found there; for I had other matters in hand, and was too hurried to look carefully for them. Mr. Main, Lecturer in Chemistry at St. John's College, Cambridge, has kindly analyzed for me a fragment of the limestone from Derbyshire. He finds only 3·5 per cent of foreign matter, the rest, 96·5, being carbonate of lime.