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Mesozoic • Jurassic group In GSP lexicon

Alozai Group

Middle and Early Jurassic

Balochistan Basin

Jurassic in the time scale →

Cited in 6 sources Last reviewed Aug 2, 2026

Unit summary
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

In the Sulaiman Fold Belt column
  1. Takatu FormationJurassic
  2. Mazar Drik FormationFossils recordedJurassic
  3. Alozai Group ◀Jurassic
  4. Khanozai GroupTriassic
  5. Kaniguram SlateTriassic
LimestoneShale / mudMetamorphicFossils recordedConformable

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.

Constituent units

Formations that make up this group, in stratigraphic order (youngest at top, as in the column).

  1. 1 Spingwar Formation Triassic
  2. 2 Loralai Formation Jurassic

Distribution & setting

Sulaiman Fold Belt
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

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
APA

Qudsi, L. (2026). Alozai Group. In Pakistan Stratigraphy Dataset [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21363991

BibTeX 
@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 August 30, 2026).

To cite the unit's original definition instead, see: Fatmi et al. (1990).

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