Source provenance

Johnson, E.A., Warwick, P.D., Roberts, S.B. & Khan, I.H. (1999). Lithofacies, depositional environments, and regional stratigraphy of the lower Eocene Ghazij Formation, Balochistan, Pakistan. U.S. Geological Survey Professional Paper 1599, 76 p.

Cited by 2 units (2 published) · 5 field-level citations · 4 revision notes.

FULL TEXT REVIEWED (reviewer-supplied PDF, USGS Prof. Paper 1599). The authoritative USGS-GSP monograph on the lower Eocene Ghazij Formation of Balochistan: exposed ~750 km along the western margin of the Axial Belt; deltaic to alluvial-plain depositional environments; hosts the principal Eocene coal fields (Mach, Sor Range, Pir Ismail Ziarat, Johan). NOMENCLATURE: this monograph treats Ghazij as a FORMATION throughout ('Ghazij Formation' used 183x vs 'Ghazij Group' 1x), subdivided into three informal vertical parts (Lower, Middle, Upper) proposed for formal member recognition, plus the named Marap Conglomerate Member (redefined by Shah 1977) and Meting Limestone Member; conglomerate and evaporite facies are mapped. This Balochistan/Kirthar 'Formation' usage differs from the Sulaiman 'Ghazij Group' scheme (Shah) and is directly relevant to the reviewer's Formation-vs-Group rank question.

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Units citing this source

• Cenozoic Ghazij Group Paleogene
  LithologyDepositional environmentEconomic importanceGeological significancePlain summary
  • Member units: RANK/MEMBER finding for the taxonomy review — USGS Professional Paper 1599 (the authoritative USGS-GSP monograph) treats Ghazij as a FORMATION throughout ('Ghazij Formation' 183x vs 'Ghazij Group' 1x), subdivided into three informal vertical parts (Lower, Middle, Upper) proposed for formal member status, plus the named Marap Conglomerate Member (Shah 1977) and Meting Limestone Member. This Balochistan/Kirthar 'Formation' usage differs from the Sulaiman 'Ghazij Group' scheme (Shaheed Ghat/Toi/Drug/Baska). Under NEITHER scheme are the Kirthar-Group units (Habib Rahi/Domanda/Pirkoh/Drazinda) Ghazij members. Left as-is pending the reviewer/GSP rank + membership decision.
  • Depositional environment: Corroborated by USGS PP 1599: deltaic to alluvial-plain depositional environments, with mapped conglomerate and evaporite facies; exposed ~750 km along the western margin of the Axial Belt. Consistent with the existing deltaic/marginal-marine/evaporitic interpretation.
  • Economic importance: Corroborated by USGS PP 1599: the Ghazij hosts the principal Eocene coal fields of Pakistan (Mach, Sor Range, Pir Ismail Ziarat, Johan). Consistent with the existing coal note.
  • Age: Corroborated by USGS PP 1599: the Ghazij Formation is lower Eocene (Early Eocene), consistent with the dataset's assignment.
• Cenozoic Kirthar Group Paleogene

  Listed as a corroborating source for this unit.