Pakistan Stratigraphy · stratigraphy.pk
Jiwani Formation
https://stratigraphy.pk/formation/jiwani-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 Pleistocene shelly coastal limestone of the Makran coast — a raised beach marking how fast the coast is rising above the subduction zone.
Youngest marine-continental transitional sequence in Makran. Contains raised beach deposits and marine terraces.
Significance. A Pleistocene raised shelly limestone of the south Makran coast; its uplifted coastal terraces record the rapid tectonic emergence of the Makran shoreline above the active subduction zone.
- Lithology
- Shelly (coquinoid) limestone and littoral concretionary deposits.
- Thickness
- 200-500 m
- Type locality
- Jiwani coastal village
- Environment
- coastal marine, littoral
- Introduced by
- HSC (1961)
Fossils
Provinces
References
- Malkani, M.S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 24.
- Cromie, P. et al. (2022). Tectonostratigraphic Evolution and Hydrocarbon Prospectivity South of Gwadar Bay, Makran Accretionary Wedge, Offshore SW Pakistan. (petroleum-system study).
Reviewer confidence: medium
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