Pakistan Stratigraphy · stratigraphy.pk
Chalt formation
https://stratigraphy.pk/formation/chalt-formation
Chalt formation
Permo-Carboniferous
Karakoram-Hindukush Basin · Southern Metamorphic Belt
Carboniferous–Permian 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 Permo-Carboniferous quartz–biotite schist unit of the Darkot Group near Chalt, north of Gilgit.
Chalt formation is named after the Chalt village about 40km N of Gilgit by Desio (1964) for quartz biotite schist, quartzite, marble and conglomerate. Ivanac et al. (1956) assigned Permo-carboniferous age based on fossils.
Significance. A Permo-Carboniferous metasedimentary unit of the Darkot Group, faulted against the Dumordo Formation in the Hunza valley; Searle (1991) treated it as part of the Ganchen Formation.
- Lithology
- Dark-grey quartz–biotite schist with subordinate quartzite, marble and conglomerate.
- Type locality
- Chalt village, about 40 km north of Gilgit, Hunza valley
- Basin
- Karakoram-Hindukush Basin
- Region
- Southern Metamorphic Belt
- Environment
- marine
- Introduced by
- Desio (1964)
Fossils
Provinces
References
- Ivanac, J. F. et al. (1956). Geology of the Chalt–Babusar area; Permo-Carboniferous age assigned on fossils.
- Malkani, M. S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Memoir of the Geological Survey of Pakistan, Vol. 24.
- 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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