Cenozoic • Paleogene In GSP lexicon

Gurguri Formation

Eocene

Cited in 4 sources Last reviewed Jul 18, 2026

Unit summary

Rank: Not recorded
Status: Published
Age: Cenozoic · Paleogene · Early–Middle EoceneEocene
Named by: Not recorded
Type locality: Gurguri, Kohat
Thickness: 100-200 m
Lithology: Shale, sandstone, minor limestone
Synonyms: Not recorded

The coarse sandy base of the Kuldana Formation in Kohat — the first continental sediment shed in as the Eocene sea withdrew.

Named after Gurguri area. Represents return to more marine conditions. Part of the Panoba Group.

Fossils

Foraminifera Mollusks

Contacts

In the Kohat Basin column

Shale / mudSandstoneLimestoneGypsum / evaporiteFossils 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.

Distribution & setting

Kohat Basin

Basin: Not recorded
Region: Not recorded
Depositional environment: continental, paralic
Coordinates: Not recorded

Correlation

Not recorded. Compare this unit against other basins on the correlation panel →

Economic significance

Reservoir

Forms part of the productive Eocene clastic reservoir intervals of the Kohat sub-basin.

Remarks

The 'Gurguri Sandstone' — the basal, conglomeratic-sandstone facies of the lower Kuldana Formation in the Kohat area, marking the influx of continental clastics during Early–Middle Eocene uplift of the Kohat shelf.

Sources (3)

Malkani, M.S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 24.
Lower Paleogene Tectonostratigraphy of Balochistan: Evidence for Time-Transgressive Late Paleocene-Early Eocene Uplift. Geosciences (MDPI), 3(3), 466 (2013).
Shah, S.M.I. (2009). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 22.

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). Gurguri Formation. In Pakistan Stratigraphy Dataset [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21363991

BibTeX

@misc{stratigraphypk_gurguriformation,
  author    = {Qudsi, Lareb},
  title     = {{Gurguri 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/gurguri-formation (accessed August 30, 2026).

Below · older

Chorgali Formation

Paleogene

Above · younger

Shekhan Formation

Paleogene

Referenced in other successions

Underlain by Chashmai Formation