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

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)259-270
Number of pages12
JournalJournal of the Geological Society of India
Volume89
Issue number3
DOIs
Publication statusPublished - 01-03-2017

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lithostratigraphy
paleoenvironment
biostratigraphy
Jurassic
sandstone
basin
parasequence
Oxfordian
ammonite
brachiopod
sea level change
conglomerate
water depth
shallow water
fossil
weather
coast
rock
sediment

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

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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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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. / Alberti, Matthias; Fürsich, Franz T.; Pandey, Dhirendra K.; Mukherjee, Debahuti.

In: Journal of the Geological Society of India, Vol. 89, No. 3, 01.03.2017, p. 259-270.

Research output: Contribution to journalArticle

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