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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 67 (1983)

Issue: 3. (March)

First Page: 498

Last Page: 498

Title: Foraminiferal Stratigraphy of Ranikot (Paleocene) of Pakistan: ABSTRACT

Author(s): A. A. Kureshy

Article Type: Meeting abstract


The sedimentary deposits of Pakistan are divided into three distinct basins: the Lower Indus basin, the Upper Indus basin, and the Baluchistan basin. The Lower Indus basin is further divided into two parts; the northern part is the Sulaiman Province, and the southern part is known as Kirthar Province. The tertiary stratigraphy of Kirthar Province is conspicuous for its characteristic lithostratigraphic units. The Paleocene deposits of Kirthar Province are designated as Ranikot Group. The Ranikot Group was divided by Cheema et al in 1977 into three distinct lithostratigraphic units: the Khadro formation (Cardita beaumonti beds), Bara formation (Lower Ranikot), and Lakhra formation (Upper Ranikot).

The Khadro and Lakhra formations are marine, characterized by foraminiferal assemblages. The characteristic planktonic forms are: Globigerina triloculinoides Plummer, Globorotalia pseudobulloides (Plummer), G. compressa (Plummer), G. velascoensis (Cushman), and G. pseudomenardii Bolli. The diagnostic forms of larger foraminifera are: Nummulites nuttalli Davies, Miscellanea (d'Archiac & Haime), Kathina major Smout, and Lockhartia conditii (Nuttall). The planktonic foraminifera were assigned to Globorotalia trinidadensis, G. pseudomenardii, and G. velascoensis zones of Kureshy in 1977, and larger foraminifera were assigned to Nummulities nuttalli zones of Kureshy in 1978. The Bara formation is nonmarine and devoid of foraminifera fauna. On the basis of the larger foraminifera, Lakhr Formation is correlated to the 1927 "Ta" Letter Stage Classification of East Indies of Van der Vlerk and Umbrogrove.

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