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V.—On the Arenig and Llandeilo Groups1

Published online by Cambridge University Press:  01 May 2009

H. Wyatt
H. Wyatt
Affiliation:
Edgell Esq. 13th Light Infantry.
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Extract

The lower strata of the Silurian system are, as yet, but little known. The labours of Welsh and other geologists have brought to light the large fauna of the Lingula flags; but while the Upper Cambrian has thus been established and elucidated, the beds which lie immediately above it, namely the “Arenig group,” and the Llandeilo flags, remain to be searched, and a great part of the respective fauna of each to be described.

The Areing, or Skiddaw, group of Sedwick forms the base of the true Silurian rocks; it immediately underlies the Llandeilo flags, from which it is totally distinct, although caused with them in Murchison's “Siluria.”

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 33 , March 1867 , pp. 113 - 117
Copyright
Copyright © Cambridge University Press 1867

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Footnotes

1

This paper (originally read before the “Geologists Association,” and published in their Proceedings on July, 1866,) was handed to the Editor of the Geological Magazine, in the autumn of the last year, by the Rev. E.Wyatt-Edgell, with a request from his son (at that time in Ireland) that it should appear in this Journal. In addition to the author' own MS. corrections, the copy was obligingly corrected by Mr. J. W. Salter, F.S.S., —Edit.

References

page 114 note 1 This paper was written in March, 1866. The volume referred to, has since been published.Google Scholar

page 115 note 1 Asaphus Corndensis belongs to the subgenus Ptychopyge of Angelin, which has certainly more the appearance of an Asaphus than of an Ogygia. The form of the labrum seems too variable in the Asaphidœ to be considered a generic distinction.—H.W.E.—( See MrWyatt-Edgell's, H. paper “On the Genera Asaphus and Ogygia, ” Geological Magazine, January, 1867, Vol. IV. p. 14.—EDIT.)CrossRefGoogle Scholar