Depositional Environment of Intertrappean and Intratrappean Beds of the Anjar Area, Kachchh District, India: Foraminiferal Evidence

A study of the Anjar area, Kachchh district, India, reveals that intertrappean and intratrappean beds associated with Deccan volcanics were deposited under shallow marine or ocean-connected lacustrine conditions, contradicting earlier suggestions of a freshwater environment. Foraminiferal assemblages, including Rotalia, Elphidium, Quinqueloculina, and Nonion species, along with siliciclastic grains and bioclasts, indicate shallow water deposition. Notably, the presence of planktic foraminifera (Pseudogloborotalia ranikotensis and Globigerina triloculinoides) in intertrappean bed L-3 suggests higher water depths during deposition. The research documents a transition from non-marine to marine and back to non-marine environments, implying phases of marine transgression followed by regression.

Srivastava, H., Bhaumik, A. K., & Mohanty, S. (2017). Depositional Environment of Intertrappean and Intratrappean Beds of the Anjar Area, Kachchh District, India: Foraminiferal Evidence. Journal of the Palaeontological Society of India, 62(2), 147–156. https://doi.org/10.1177/0971102320170202