Mesozoic • Jurassic In GSP lexicon

Reshit Formation

late Middle Jurassic

Jurassic in the time scale →

Cited in 6 sources Last reviewed Jul 30, 2026

Unit summary

Rank: Not recorded
Status: Published
Age: Mesozoic · Jurassic · late Middle Jurassiclate Middle Jurassic
Named by: Gaetani et al. (1990a)
Type locality: Reshit village, Chapursan valley, upper Hunza36.8241°N, 74.5124°E
Thickness: about 300 m
Lithology: A monotonous sequence (about 300 m) of dark grey, cherty mudstone and wackestone.
Synonyms: Not recorded

A late Middle Jurassic cherty mudstone-and-wackestone unit above the Yashkuk Formation.

Named after Reshit village in Chapursan valley. Marine carbonates on southern Asian plate margin.

Fossils

Foraminifera Ostracods Crinoids Corals Echinoids Brachiopods Ammonites

Contacts

In the Karakoram column

LimestoneSandstoneMixedMarlFossils recordedContact not recorded

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.

Distribution & setting

Karakoram

Basin: Not recorded
Region: Not recorded
Depositional environment: marine
Coordinates: 36.8241°N, 74.5124°E

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Correlation

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

Economic significance

Not recorded

Remarks

A late Middle Jurassic cherty carbonate unit overlying the Yashkuk Formation in the intensely faulted Chapursan valley succession.

Research notes (3)

Field-by-field findings drawn from the cited literature. Every statement is traced to a registered source — follow a citation for the full reference.

Name & nomenclature (1)

Attested in Shah (2009), Geological Survey of Pakistan Memoir 22 - the Stratigraphic Committee of Pakistan's compiled lexicon (listed in the memoir's contents). Adds the definitional GSP/SCP lexicon citation.

Shah, S.M.I. (2009)

Age & correlation (1)

Zanchi & Gaetani (2011): the Reshit Formation yields Aalenian–Bajocian nannofossils (Gaetani et al. 1993); introduced by Gaetani et al. (1990a). About 300 m of dark grey oncolitic–oolitic packstone and mudstone/wackestone of an open carbonate shelf with evaporitic episodes and restricted lagoons (gypsum and thin coal seams occur in the Chapursan Valley); it aggraded onto the previously emerged area during the Aalenian.

Zanchi, A. & Gaetani, M. (2011)

Type locality & location (1)

Type-locality coordinate set from reviewer-supplied GPS (36.824067 N, 74.512372 E), Chapursan valley, upper Hunza; supersedes an approximate fleet estimate.

OpenStreetMap contributors and GEOnet Names Server (public geographic gazetteers), used to geolocate named GSP type localities to approximate decimal coordinates.

Sources (5)

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.
OpenStreetMap contributors and GEOnet Names Server (public geographic gazetteers), used to geolocate named GSP type localities to approximate decimal coordinates.
Shah, S.M.I. (2009). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 22.
Zanchi, A. & Gaetani, M. (2011). The geology of the Karakoram range, Pakistan: the new 1:100,000 geological map of Central-Western Karakoram. Italian Journal of Geosciences, 130(2), 161-262.

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.

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Cite this unit

APA

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

BibTeX

@misc{stratigraphypk_reshitformation,
  author    = {Qudsi, Lareb},
  title     = {{Reshit 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/reshit-formation (accessed October 29, 2026).

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

Below · older

Yashkuk Formation

Jurassic

Above · younger

Darband Formation

Cretaceous

Referenced in other successions

Underlain by Aghil Limestone