Systematic paleontology and morphological variations in nummulites assemblage of Eocene Chorgali Formation of Nurpur area, Salt Range, Punjab, Pakistan. | [Geological Bulletin of the Punjab University • 2002]

Author(s):

1. S. R. H. Baqri: Pakistan Museum Natural History (PMNH) Islamabad, Pakistan

2. Ghazala Roohi: Pakistan Museum Natural History (PMNH) Islamabad, Pakistan

3. Nayyer Iqbal: Pakistan Museum Natural History (PMNH) Islamabad, Pakistan

4. M. Mansoor Qureshi: Zoology Department, University of Azad Jammu & Kashmir, Muzaffarabad, Pakistan

5. Basharat Ahmed: Zoology Department, University of Azad Jammu & Kashmir, Muzaffarabad, Pakistan

Abstract:

The present studies were conducted for the identification of the fossil forminifera collected from the Chorgali Formation exposed at Nurpur Area in the Salt Range. The Chorgali formation represents the paleoenvironments before the deposition of the Kuldana Formation. The Chorgali Formation were deposited in marine water condition while Kuldana Formation was deposited mostly in fresh to brackish and occasionally shallow marine water conditions. The larger foraminifera identified in the Chorgali Formation are mainly Nummulites. The detailed taxonomical studies of these larger foraminifera indicated the presence of two common species in the Chorgali Formation identified as Nummulites atacicus and Nummulites off. Globules. Morphological variations in N. atacicus and N. globulus from a number of localities are documented here. The Nummulites found in the Chorgali Formation lived in the clean, warm water during the deposition of the carbonates of the Chorgali Formation. These creatures vanished due to the transportation of the detritus in to the sea and changing the clean waters into the muddy dirty water.

Page(s): 9-16

DOI: DOI not available

Published: Journal: Geological Bulletin of the Punjab University, Volume: 37, Issue: 1, Year: 2002

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