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Journal of the Geological Society of India

, Volume 89, Issue 3, pp 259–270 | Cite as

Overview on the middle to upper Jurassic sedimentary succession of Gangta Bet in the Kachchh basin, western India, with special emphasis on its lithostratigraphy, biostratigraphy, and palaeoenvironment

  • Matthias Alberti
  • Franz T. Fürsich
  • Dhirendra K. Pandey
  • Debahuti Mukherjee
Article

Abstract

The Jurassic succession of Gangta Bet in the Kachchh basin of western India comprises around 130 m of mostly siliciclastic rocks. The strata belong to the Gangta Member of the Gadhada Formation and are herein sub-divided into four units: the Gangta sandstone beds, the lower silty sandstone beds, the upper silty sandstone beds, and the Gangta ammonite beds. These units can be separated by three marker horizons: the Brachiopod bed, the Gangta Conglomerate Bed, and the Gervillella Bed. Ammonites indicate an Oxfordian age for the upper half of the succession, but the scarcity of identifiable fossils in its basal part so far prevented precise biostratigraphic assignments. The shallow-water sediments can be interpreted as parasequences as a result of minor sea-level changes. Deposition took place close to the palaeo-coastline at water depths around the fair-weather wave-base.

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Copyright information

© Geological Society of India 2017

Authors and Affiliations

  • Matthias Alberti
    • 1
    • 2
  • Franz T. Fürsich
    • 3
  • Dhirendra K. Pandey
    • 2
  • Debahuti Mukherjee
    • 4
  1. 1.Institut für GeowissenschaftenChristian-Albrechts-Universität zu KielKielGermany
  2. 2.Department of GeologyUniversity of RajasthanJaipurIndia
  3. 3.GeoZentrum Nordbayern, Fachgruppe PaläoUmweltFriedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany
  4. 4.Geological Survey of IndiaKolkataIndia

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