Alozai Group
Middle and Early Jurassic
Balochistan Basin
Jurassic in the time scale →Cited in 6 sources Last reviewed Aug 2, 2026
- Rank
- group
- Status
- Published
- Age
- Mesozoic · Jurassic · Early–Middle JurassicMiddle and Early Jurassic
- Named by
- Fatmi et al. (1990)
- Type locality
- Not recorded
- Thickness
- Not recorded
- Lithology
- Jurassic shelf-carbonate and shale succession comprising the Loralai Formation over the Spingwar Formation.
- Synonyms
- Allozai Formation
A Jurassic group of the western Sulaiman / Balochistan transition comprising (in descending order) the Loralai Formation and the Spingwar Formation. Both were originally members of the Shirinab Formation (Williams, 1959; Fatmi, 1977); they were elevated to formation rank and grouped as the Alozai Group by Fatmi et al. (1990), as mapped by USGS OFR 94-689 (Maldonado, Khan & Mengal, 1994) and adopted by Shah (2009). Kadri (1995) still lists them as Shirinab members.
Fossils
Not recorded
Contacts
Band colour = period; texture = dominant rock type. Lines between bands mark the contact type; dotted = no contact recorded in the sources (not a claim of conformity). 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.
Constituent units
Formations that make up this group, in stratigraphic order (youngest at top, as in the column).
Distribution & setting
- Basin
- Balochistan Basin
- Region
- Not recorded
- Depositional environment
- Not recorded
- Coordinates
- Not recorded
Correlation
Not recorded. Compare this unit against other basins on the correlation panel →
Economic significance
Not recorded
Remarks
Not recorded
Research notes (2)
Field-by-field findings drawn from the cited literature. Every statement is traced to a registered source — follow a citation for the full reference.
Age & correlation (1)
-
Usage varies in the Zhob–Pishin area: the GSP Karezat abstract (Waliullah et al.) applies the name at formation rank — 'Allozai Formation', a Triassic limestone/shale locally intruded by ophiolitic ultramafics (Khanozai–Torkhula segment) — implying the group may extend into the Triassic, whereas the curated record (after USGS OFR 94-689; Kazmi & Jan 1997) treats the Alozai Group as Lower–Middle Jurassic (Spingwar + Loralai formations). Recorded as an alternative; the curated Jurassic scope is retained.
Khan, J.A., Waliullah & Akhtar, W. (2024)
Geological significance (1)
-
Kazmi & Jan (1997) NAMING FLAG: the book treats the 'Alozai Group' (HSC 1960; Wulgai section near Muslimbagh) as a superseded name — the rocks are re-mapped as the Triassic Wulgai Formation (dark mudstone/shale with thin limestone) and the Jurassic Shirinab Formation (Williams 1959, Fatmi 1977). The DB 'Alozai Group' should be reconciled with this two-formation revision.
Kazmi, A.H. & Jan, M.Q. (1997)
Sources (7)
- Maldonado, F., Khan, S.H. & Mengal, J.M. (1994). Preliminary Geologic Map of Parts of Loralai, Sibi, Quetta, and Khuzdar Divisions, Balochistan Province, West-Central Pakistan. U.S. Geological Survey Open-File Report 94-689, 20 p.
- Shah, S.M.I. (2009). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 22.
- Maldonado, F., Khan, S.H. & Mengal, J.M. (1994). Preliminary Geologic Map of Parts of Loralai, Sibi, Quetta, and Khuzdar Divisions, Balochistan Province, West-Central Pakistan. U.S. Geological Survey Open-File Report 94-689, 20 p., 1 sheet.
- Kazmi, A.H. & Jan, M.Q. (1997). Geology and Tectonics of Pakistan. Graphic Publishers, Karachi.
- Kazmi, A.H. & Abbasi, I.A. (2008). Stratigraphy and Historical Geology of Pakistan. Department & National Centre of Excellence in Geology, University of Peshawar, Peshawar. 524 pp. ISBN 978-969-9119.
- Waliullah, Khan, J.A. & Akhtar, W. Preliminary geology and mineral potential of the Karezat and Barshor quadrangles (toposheets 34 N/6 and 5), district Pishin, Balochistan. Geological Survey of Pakistan, Quetta (abstract).
- Ali, H.M.Z., Zubair, M.I., Ali, H., Akbar, G. & Awan, A.A. (2021). Geology, geochemistry and petrographic studies of exposed rock units from Zhob and Qila Saifullah districts of Balochistan. Pakistan Journal of Scientific and Industrial Research, Series A: Physical Sciences, 64A(3), 240-246.
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: Name attested in the Shah (1977/2009) Geological Survey of Pakistan compilation — the national stratigraphic lexicon. This records where the name is documented; it is not an endorsement of the unit’s definition, age or figures.
Cite this unit
Qudsi, L. (2026). Alozai Group. In Pakistan Stratigraphy Dataset [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21363991
@misc{stratigraphypk_alozaigroup,
author = {Qudsi, Lareb},
title = {{Alozai Group} --- 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/alozai-group (accessed October 29, 2026).
To cite the unit's original definition instead, see: Fatmi et al. (1990).
Related units
More from Sulaiman Fold Belt
Same age (Mesozoic · Jurassic)
Saved on this device only.