Wad Sayyidan Formation
Proterozoic
Indo-Pakistan Shield
Part of Hachi Volcanic Group
Precambrian in the time scale →Cited in 1 source Last reviewed Jul 17, 2026
- Rank
- formation
- Status
- Published
- Age
- Precambrian · Precambrian · ProterozoicProterozoic
- Named by
- Hartsch et al. (2018)
- Type locality
- Not recorded
- Thickness
- 1054 m
- Lithology
- Mafic volcanics and volcaniclastics (basalts and basaltic andesite) interbedded with slates, graphitic slates, dolomites and quartzwackes.
- Synonyms
- Not recorded
Lower formation of the Hachi Volcanic Group, exposed at Wad Sayyidan and Gutti Sayyidan (Chiniot District): mafic volcanics and volcaniclastics interbedded with slates, graphitic slates, dolomite and quartzwacke. Its base is not exposed (Chaudhry, Ahsan & Rehman 2022; after Hartsch et al. 2018).
Fossils
Not recorded
Contacts
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.
Distribution & setting
- Basin
- Indo-Pakistan Shield
- Region
- Not recorded
- Depositional environment
- volcanic, marine
- Coordinates
- Not recorded
Correlation
Not recorded. Compare this unit against other basins on the correlation panel →
Economic significance
Not recorded
Remarks
Not recorded
Sources (1)
- Chaudhry, M.N., Ahsan, N. & Rehman, S.U. (2022). Revised Stratigraphy of Sargodha-Chiniot Area, Punjab, Pakistan. The Geological Bulletin of the Punjab University, 2022, pp. 1-9.
Reviewer confidence: high
Every fact on this page is source-cited. This entry is part of the peer-archived Pakistan Stratigraphy Dataset (doi.org/10.5281/zenodo.21363991, CC‑BY‑4.0).
Lexicon status: Defined in journal or other literature; not found in a GSP memoir. There is no body currently ratifying unit status, so provenance is shown in place of a formal ruling.
Cite this unit
Qudsi, L. (2026). Wad Sayyidan Formation. In Pakistan Stratigraphy Dataset [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21363991
@misc{stratigraphypk_wadsayyidanformation,
author = {Qudsi, Lareb},
title = {{Wad Sayyidan Formation} --- Pakistan Stratigraphy Dataset},
year = {2026},
publisher = {Zenodo},
doi = {10.5281/zenodo.21363991},
url = {https://doi.org/10.5281/zenodo.21363991}
} Archived dataset: doi.org/10.5281/zenodo.21363991 (CC‑BY‑4.0) · Direct link to this entry: https://stratigraphy.pk/formation/wad-sayyidan-formation (accessed August 30, 2026).
To cite the unit's original definition instead, see: Hartsch et al. (2018).
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