Abstract
LONDON. Geological Society, March 5.—Dr. Aubrey Strahan, F.R.S., president, in the chair.—S. S. Buckman: The “Kelloway Rock” of Scarborough. The author has studied the types of ammonites from the Kelloway Rock described by Leckenby, preserved in the Sedg-wick Museum, Cambridge, and a series of Yorkshire Kelloway-Rock ammonites from the Museum of Practical Geology, London. He has grouped these ammonites according to their different matrices, and finds that they indicate several different zones. These zones he arranges in sequence, and suggests how they may be compared with the sections of Kelloway Rock of Scarborough given by Leckenby and by Fox-Strangways. The exact order of the zones is, in one or two cases, not considered to be proved, but the paper is offered with the idea of indicating where further work is required.—L. F. Spath: Jurassic am monites from Jebel Zaghuan (Tunis). Jebel Zaghuan, the best-known and most conspicuous, though not the highest, mountain of the Tunisian Atlas, is built up largely of massive bluish-grey limestones. of con fused stratification which have been referred to the Middle Lias on the evidence of badly preserved belem-nites and Terebratulse, notably “Pygope” aspasia, Columna sp. Middle Liassic (Domerian) ammonites are now recorded for the first time. A new classification of the Domerian genera of the family Hildo-ceratidae, to which the fossils from Jebel Zaghuan belong, is proposed. Moreover, the ammonites col lected by the author afford sufficient evidence of the presence of the zone of Reineckia anceps, which occurs in Algeria, but had been supposed absent in Tunis, together with the other beds intervening be tween the Middle Lias and the Corallian.
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Societies and Academies . Nature 91, 101–103 (1913). https://doi.org/10.1038/091101a0
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DOI: https://doi.org/10.1038/091101a0