Pakistan Stratigraphy · stratigraphy.pk
Nowshera Formation
https://stratigraphy.pk/formation/nowshera-formation
Stratigraphic position
Band colour = period; texture = dominant rock type. Lines between bands mark the contact type (wavy = unconformity inferred from a missing period). 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.
An Early Devonian coral-stromatoporoid reef complex at Nowshera, above the Panjpir Formation.
Exposed in Nowshera area. Contains conodonts and brachiopods indicating Ordovician-Silurian age.
Significance. An Early Devonian reef complex at Nowshera, conformably overlying the Late Silurian Panjpir Formation; as redefined by Pogue and Hussain (1986) it includes a lower fossiliferous limestone/dolomite, a middle carbonate-cemented sandstone (the Misri Banda Quartzite of Stauffer) and an upper limestone/dolomite (the Pir Sabak Formation). Conodonts indicate an Early Devonian age.
- Lithology
- Reef limestone rich in corals and stromatoporoids, surrounded by brecciated reef limestone and sparsely fossiliferous dolomite, with a middle carbonate-cemented sandstone unit.
- Thickness
- 595 m
- Type locality
- 3.5 km north of Nowshera
- Environment
- marine, reef
- Introduced by
- Stauffer (1968); redefined by Pogue and Hussain (1986)
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: medium
Related units
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