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The Carboniferous Limestone Series of West Cumberland

Published online by Cambridge University Press:  01 May 2009

Charles Edmonds
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Summary

The examination of the fossil fauna, the chief forms of which are shown in Tables I and II and Fig. 1, shows that the beds commence at a high horizon of the Seminula Zone and extend to the top of the Dibunophyllum Zone. Also, the “life-zones” established by Professor Garwood in his North-Westem Province Paper can be readily recognized in our area and the series includes the sequence from the Nematophyllum minus sub-zone of the Productus corrugatohernisphericus Zone to the Dibunophyllum muirheadi sub-zone of the Dibunophyllum Zone. It can further be established that the limestones of our area do not persist up the horizon of the Botany Beds with Aulina mtiformis S. Smith. The Saccammina Band occurs in our area, but Saccammina occurs also in the limestones immediately above and below. The Girvanella Band of the North-West Province has been recognized and forms a constant horizon throughout the area. It occurs associated with a calcitemudstone and never as a nodular bed. Other bands also appear to be algal. The Spiriferina cf. laminosa Band of Garwood forms a constant horizon between the Seventh and Sixth Limestones.

Type
Original Articles
Information
Geological Magazine , Volume 59 , Issue 3 , March 1922 , pp. 117 - 131
Copyright
Copyright © Cambridge University Press 1922

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References

page 118 note 1 The calcareous mudstones (12, 14, and 16) are differentiated from the “calcite-mudstones” of E.E.L. Dixon in that they do not weather white and have no conchodial fracture; they have a peculiar texture that can only be described as wood like. The beds marked “calcite-mudstones” are like those described in the “Gower Paper”, pp. 516–17.

page 123 note 1 Op. cit.

page 123 note 2 The approximate scale of this section is 220 feet to 1 inch.

page 125 note 1 DrSmith, Stanley, has given (Q.J.G.S., vol. lxxi, 1916, p. 242) the characteristic fauna of the Scar Limestone.Google Scholar

page 125 note 2 Garwood's North-West Province paper, p. 482.Google Scholar

page 125 note 3 DrSmith, S., op. cit., pp. 242–3.Google Scholar

page 125 note 4 Cf. Garwood's North-West Province paper, pp. 481, 539.Google Scholar

page 126 note 1 “The Faunal Succession of the Upper Bernician”: Trans. Nat. Hist. Soc. Northumberland, etc., n.s., vol. iii, 1910, p. 591.Google Scholar

page 126 note 2 Garwood, E. J., Proc. Geol. Assoc., vol. xxvii, 1916, pl. xvii, fig. 1.Google Scholar

page 129 note 1 Op. cit.Google Scholar