Source provenance
Nizami, A.R. & Sheikh, R.A. (2007). Microfacies analysis and diagenetic settings of the Samana Suk Formation, Chichali Nala section, Surghar Range, Trans Indus Ranges, Pakistan. Geological Bulletin of the Punjab University, 42, 37-52.
Cited by 1 unit (1 published) · 0 field-level citations · 3 revision notes.
Full text reviewed (reviewer-supplied extract). 43.27 m of the Middle Jurassic Samana Suk Formation at Chichali Nala (Surghar Range); 89 thin sections. Microfacies: oolitic, peloidal, intraclastic and grapestone grainstones, skeletal wackestone/packstone, carbonate mudstone -> shallowing-upward shallow-shelf carbonate platform on the northern Indian-plate Tethyan margin. Diagenesis spans marine-phreatic (dog-tooth/acicular cements), meteoric-phreatic (drusy spar, syntaxial overgrowths) and deep-burial (poikilotopic calcite, stylolite ferroan dolomite), with fabric-selective to pervasive dolomitisation and later dedolomitisation. Rests conformably on Shinawari Formation; disconformably overlain by Chichali Formation across a lateritic hardground.
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Units citing this source
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- Lithology: Nizami & Sheikh (2007) logged 43.27 m of the Samana Suk Formation at Chichali Nala (Surghar Range) and recognised oolitic, peloidal, intraclastic and grapestone grainstones, skeletal wackestones/packstones and carbonate mudstones, recording shallowing-upward shallow-shelf carbonate-platform cycles on the northern Indian-plate Tethyan margin.
- Geological significance: Diagenesis spans the marine-phreatic (dog-tooth and acicular rim cements), meteoric-phreatic (drusy equant spar, syntaxial overgrowths) and deep-burial realms (poikilotopic calcite, stylolite-associated ferroan dolomite), with fabric-selective to pervasive dolomitisation and later dedolomitisation (Nizami & Sheikh 2007).
- stratigraphicPosition: At Chichali Nala the formation rests conformably on the Shinawari Formation and is disconformably overlain by the Chichali Formation across a lateritic/ferruginous hardground encrustation (Nizami & Sheikh 2007).