Pakistan Stratigraphy · stratigraphy.pk
Pirkoh Formation
https://stratigraphy.pk/formation/pirkoh-formation
Stratigraphic position
Band colour = period; texture = dominant rock type. Lines between bands mark the contact type. True scale makes height ∝ recorded thickness; hatched = thickness not recorded. Ages approximate, for ordering.
This unit (highlighted) within its province column; faded ends continue above and below. Line style marks the contact type.
A fossil-rich Middle Eocene limestone of the Kirthar Group and a key gas reservoir (Pirkoh field).
Named after Pirkoh area. Marine sequence in southernmost Kohat region. Part of the Kahan Group.
Significance. A highly fossiliferous Middle Eocene limestone of the Kirthar Group and a major gas reservoir in the Sulaiman province.
- Lithology
- Brown, grey to white, thin-bedded limestone with subordinate argillaceous limestone and dark-grey calcareous claystone.
- Thickness
- 10–175 m
- Type locality
- Pirkoh anticline
- Environment
- shallow marine
- Introduced by
- Hemphill et al. (1973)
- Economic importance
- The Pirkoh Limestone is a significant gas reservoir (Pirkoh gas field).
Fossils
Provinces
References
- Malkani, M.S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 24.
- Kazmi, A.H. & Jan, M.Q. (1997). Geology and Tectonics of Pakistan. Graphic Publishers, Karachi.
Reviewer confidence: high
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