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IV.—The Reported Occurrence of Ammonites Jurensis in the Northampton Sands

Published online by Cambridge University Press:  01 May 2009

S. S. Buckman
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Extract

In the Geological Magazine (Dec. III. Vol. VIII. No. 329, p. 493, Nov. 1891), Mr. E. T. Newton has a “Note on the Occurrence of Am. jurensis in the Ironstone of the Northampton Sands in the Neighbourhood of Northampton.” This note had especial interest for me, from my having contested Mr. Beeby Thompson's view of the Jurensis-zone being represented by the clayey beds beneath the Sands; and, in fact, it seemed to support my argument. Further reading, however, obliged me to confess that I could not claim this support; for Mr. Newton says (p. 494), “that the specimens of Am. jurensis agree exactly with Dr. Wright's plate 79 (Lias Ammonites).”

Type
Original Articles
Information
Geological Magazine , Volume 9 , Issue 6 , June 1892 , pp. 258 - 260
Copyright
Copyright © Cambridge University Press 1892

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References

page 258 note 1 Inferior Oolite, etc., Proc. Cotteswold Club, vol. ix pt. ii. p. 134, footnote, 1887.Google Scholar

page 258 note 2 Monogr. Lias Amm. pt. ii. p. 44, footnote, Pal. Soc. 1888.Google Scholar

page 258 note 3 Untere Dogger, Abh. geol. spez. karte Elsass-Lothnngen, Bd. II. pi. i. fig. 8.

page 259 note 1 The umbilicus of the typical Wrighti is basin -shaped, that of the typical jurensis wider and graduated.