Source provenance

Rehman, S.U., Ahmed, M., Munawar, M.J., Rehman, F., Anjum, M.N. & Ullah, M.F. (2024). Outcrop geology, microfacies analysis and depositional environments of Chorgali Formation from Bhattian and Gharaga, Southern Hazara Basin, Pakistan. Pakistan Journal of Science, 76(1), 106-121.

Cited by 1 unit (1 published) · 0 field-level citations · 3 revision notes.

Reviewer-supplied. Outcrop, petrographic and microfacies analysis of the Early Eocene Chorgali Formation at the Gharaga and Bhattian sections, Southern Hazara Basin. Recognises five microfacies (Nummulites-Lockhartia and Nummulites-Assilina wackestone-packstone, Ostracod-Miliolid packstone, marls and calcareous shale) and interprets deposition on a carbonate mid-ramp with a partially restricted inner-ramp lagoon and proximal outer ramp; lower contact with the Margalla Hill Limestone, upper gradational contact with the Kuldana Formation.

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Units citing this source

• Cenozoic Chorgali Formation Paleogene
  • Depositional environment: Rehman et al. (2024), Gharaga and Bhattian sections (Southern Hazara Basin): five microfacies of the Chorgali Formation — Nummulites–Lockhartia wackestone-to-packstone (MF-1), Nummulites–Assilina wackestone-to-packstone (MF-2), Ostracod–Miliolid packstone (MF-3), marls (MF-4) and calcareous shale (MF-5) — indicate deposition on a carbonate mid-ramp, with some accumulation in a partially restricted inner-ramp lagoon and in the proximal outer ramp, during the Late Paleocene–Early Eocene transgressive cycles of the Neo-Tethys.
  • Fossils: Rehman et al. (2024): the Chorgali Formation at these Hazara sections yields abundant Eocene larger benthic foraminifera — Nummulites, Assilina and Lockhartia — together with miliolids and ostracods (and their broken shells), consistent with a shallow carbonate-ramp fauna.
  • Lower contact (overlies): Rehman et al. (2024): in the Southern Hazara Basin the Chorgali Formation has a well-preserved lower contact with the Early Eocene Margalla Hill Limestone and an upper gradational (intercalated) contact with the Middle Eocene Kuldana Formation — a regional relationship distinct from the Salt Range, where the Chorgali overlies the Sakesar Limestone. Lithologically it is a predominantly marly and argillaceous limestone with marls and calcareous shale.