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VI.—Woodwardian Museum Notes: on some Anglesey Dykes. No. III

Published online by Cambridge University Press:  01 May 2009

Alfred Harker
Alfred Harker
Affiliation:
Fellow of St. John's College, Cambridge.
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Extract

In the first paper of this series were described several dykes from the shores of the Menai Straits, belonging apparently to one system of intrusions, and some of them cutting Carboniferous strata. Their precise age, however, can be fixed only on the supposition that they may fairly be correlated with certain post-Carboniferous but pre-Permian dykes in the Anglesey Coal-field. These latter rocks have a strong general resemblance to the Menai Straits dykes, and as they are by no means easily accessible, they will not be described in detail. Only one will be selected, as offering a rather pronounced type: the specimen is from the Henslow collection.

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 6 , June 1888 , pp. 267 - 272
Copyright
Copyright © Cambridge University Press 1888

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References

page 267 note 5 Geol. Mag. Dec. III. Vol. IV. p. 409, 1887.Google Scholar See also op. cit. p. 546.

page 269 note 1 Cf. Amer, Van Hise. Journ. Sci. (3) xxiii. p. 385, 1887.Google Scholar

page 269 note 2 Trans. Camb. Phil. Soc. vol. i. p. 419, 1822.Google Scholar

page 272 note 1 Sitzungsb. d. k. Akad. d. Wien. vol. lvi. p. 283, and plate, 1867.Google Scholar

page 272 note 2 Jahrbuch, Neues, 1879, p. 823.Google ScholarHussak, , Anleitung zum bestimmen der gesteinbildenden Mineralien, p. 72; 1885.Google Scholar