Sedimentary Facies and depositional environment of the Lower Eocene shallow shelf carbonate deposit, the Sakesar Limestone, Salt Range, Pakistan

Ghazi, Shahid; Khalid, Pervaiz; Butt, Abida; Sharif, Sadaf; Hanif, Tanzila

doi:10.5176/2251-3353_geos14.22

Cited by 2 publications

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“…Further, many workers (e.g. Sameeni et al, 2013;Ahsan 2008;Ghazi et al, 2014;Mujtaba, 1999) reported ramp settings for deposition of Eocene strata in NW Himalayas which confer that Chorgali Formation was deposited under partially restricted to open marine ramp settings. The fields data reveal that Chorgali Formation conformably overlies the Early Eocene Margalla Hill limestone.…”

Section: Discussionmentioning

confidence: 99%

“…Work of Ahsan and Chaudhary (2008) and Rehman et al, (2016Rehman et al, ( , 2019Rehman et al, ( , 2021 infer the ramp settings for Hazara basin from Upper Cretaceous to onward Paleogene strata. Similarly, Sameeni et al, (2013), Ahsan (2008), Ghazi et al, (2014) and Mujtaba (1999) suggested ramp deposition for Eocene strata of NW Himalayas.…”

Section: Calcareous Shale Microfacies (Mf-5)mentioning

confidence: 96%

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Outcrop geology, microfacies analysis and depositional environments of Chorgali Formation from Bhattian and Gharaga, Southern Hazara basin Pakistan

Saif Ur Rehman

2024

PJS

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In Hazara Basin, Early Eocene is represented by carbonate succession of Chorgali Formation which is mainly composed of limestone with marls and calcareous shale. Limestone is predominantly marly and argillaceous in nature. Two Stratigraphic sections of Chorgali Formation exposed at Gharaga and Bhattian villages have been completely examined and sampled for outcrop characteristics, petrography, microfacies and depositional settings. These sections have both well preserved lower and upper contacts with Early Eocene Margalla Hill limestone and Middle Eocene Kuldana Formation, respectively. The petrographic analyses reveal that Chorgali Formation exposed at Gharaga and Bhattian sections yields abundant Eocene foraminifers along with other fauna and their broken shells. On basis of outcrop data and detailed petrographic analyses, five microfacies are recognized including Nummulites-Lockhartia wackestone to packstone (MF-1), Nummulites- Assilina wackestone to packstone (MF-2), Ostracods-Miliolids packstone (MF-3), Marls Microfacies (MF-4) and Calcareous shale Microfacies (MF-5). Comprehensive microfacies, palaeoecological and outcrop data reveal that deposition of Chorgali Formation was occurred on mid ramp settings with some deposition in attached to partially restricted lagoonal area of inner ramp and proximal part of outer ramp.

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Section: Discussionmentioning

confidence: 99%