Pakistan Stratigraphy · stratigraphy.pk
Pab Sandstone
https://stratigraphy.pk/formation/pab-sandstone
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 thick, clean Maastrichtian sandstone of the Pab Range — one of the main oil-and-gas reservoir rocks of the Indus Basin.
Major sandstone unit in Sulaiman and Kirthar basins. Represents coastal to shallow marine conditions. Good petroleum reservoir.
Significance. A widespread Maastrichtian quartzose sandstone resting on the Fort Munro Formation (locally on the Parh Limestone); its clean, cross-bedded sands form a major regional petroleum reservoir and mark the terminal Cretaceous clastic influx into the Indus shelf.
- Lithology
- White, cream or brown, thick-bedded to massive, cross-bedded, medium- to coarse-grained quartzose sandstone with subordinate argillaceous limestone and shale.
- Thickness
- 240–1,000 m (490 m at the Pab Range type section)
- Type locality
- West of Wirahab Nai, Pab Range
- Environment
- marginal marine, deltaic
- Introduced by
- Vredenburg (1909)
- Economic importance
- A major quartzose-sandstone hydrocarbon reservoir in the Lower Indus Basin.
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
Related units
Saved on this device only.