Pakistan Stratigraphy · stratigraphy.pk
Marpo sandstone
https://stratigraphy.pk/formation/marpo-sandstone
Marpo sandstone
Jurassic
Karakoram-Hindukush Basin · Central Karakoram Batholith
Jurassic in the time scale →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 Middle Jurassic red sandstone unit of the Aghil Pass and Shaksgam area, above the Tekri Formation.
Marpo sandstone is named by Gaetani et al. (1990b) and consists of 20-100m sandstone and siltstones and exposed in the Aghil pass and Shaksgam valley and age is middle Jurassic.
Significance. A Middle Jurassic red-bed sandstone unit overlying the Tekri Formation in the Aghil Pass and Shaksgam region.
- Lithology
- 20–100 m of red sandstone and siltstone; the base has ostracod-bearing grey marl interbedded with red siltstone and overlain by polymict conglomerate, passing up into red shaly sandstone.
- Thickness
- 20–100 m
- Type locality
- Aghil Pass region and Shaksgam valley, eastern Karakoram
- Basin
- Karakoram-Hindukush Basin
- Region
- Central Karakoram Batholith
- Environment
- fluvial, marginal marine
- Introduced by
- Gaetani et al. (1990b)
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
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