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On the Distribution of Productus humerosus (= sublaevis) and the Zonal Range of the “Brachiopod Beds” of the Midlands

Published online by Cambridge University Press:  01 May 2009

T. Franklin Sibly
T. Franklin Sibly
Affiliation:
Armstrong College, Newcastle-upon-Tyne.
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Extract

In 1908 the Productus humerosus beds in the Carboniferous Limestone of Caldon Low, N. Staffs, were tentatively assigned to the Lower Dibunophyllum zone, D1, of Vaughan's classification. The slender evidence for this correlation was set out in my paper on the Midland Area.

Type
Original Articles
Information
Geological Magazine , Volume 57 , Issue 1 , January 1920 , pp. 20 - 22
Copyright
Copyright © Cambridge University Press 1920

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References

page 20 note 1 Quart. Journ. Geol. Soc., vol. lxiv, 1908, p. 44.Google Scholar

page 20 note 2 Ibid., vol. lxxiii, 1918, pp. 94–100.

page 21 note 1 “In the Franco-Belgian area the early, smooth form of Pr. sublævis occurs in a persistent band between Tournaisian and Viséan. In the South-Western Province this mutation is very rare; it has, however, been recorded from the C2 oolite ot Burrington. In the Clitheroe area, the early Pr. sublævis enters at the top of C1 and forms a persistent band at the top of C2 (as in Belgium).” (A. Vaughan, Quart. Journ. Geol. Soc, vol. lxxi, 1915-17, p. 47.)

page 21 note 2 Geol. Mag., 1918, p. 480. Dr. Hind quoted the occurrence of Cyrtina septosa in the humerosus beds of Leicestershire as one indication of Caninia age as against D1 age, notwithstanding the fact that Cyrtina septosa occurs in D1 of Derbyshire and the South-Western Province, and characterizes a persistent band in D1, of the North-Western Province.

page 21 note 3 Geol. Mag., Vol. LVI, 1919, p. 335 and pp. 507–9.Google Scholar

page 21 note 4 Quart. Journ. Geol. Soc., vol. lxiv, 1908, pp. 47–50.Google Scholar

page 21 note 5 Ibid., vol. lxiv, 1908, p. 39, fig. 2.