Societies and Academies

Abstract

LONDON. Geological Society, April 22.—W. L. F. Nuttall: The stratigraphy and palaeontology of the Laki series (Lower Eocene) of parts of Sind and Baluchistan (India). Some of the massive white foraminiferal Eocene limestones of Sind, with a thickness of about 600 feet, found along the Laki Range and in Lower Sind, contain a different and earlier fauna of Fora-minifera than that of the Kirthar series as exposed in the Kirthar Range. In the area near Meting the following divisions in the Laki series are proposed: Laki Limestone, Meting Shales, Meting Limestone, Basal Laki Laterite. The term Alveolina Limestone is discarded, as Alveolinae are found in both the Laki and the Meting Limestones. The Meting Limestone is correlated with the Dunghan Limestone of R. D. Oldham, which is found in the Bolan Pass and other places in Baluchistan. The Ghazij Shales of Baluchistan, which are absent in Sind, pass up conformably into the Lower Kirthar series. The upper part of these shales is younger than the- Laki Limestone. In Sind the Laki Limestone is overlain unconformably by the Middle Kirthar, Nari (Oligocene), or Lower Manchar (Pliocene) beds. The Laki series rests unconformably on the Upper Ranikot, with the upper members of the Laki series as traced northwards overlapping the lower. The fauna of the Laki series, which is different from that of the Kirthar series, suggests that the former are of Lower Eocene age rather than Lower Lutetian, as has hitherto been supposed.