North-west part of the Indian peninsula was converted into a great centre of vulcanicity in

The north-west part of the Indian peninsula underwent significant volcanic activity during the end of the Cretaceous period, leading to the formation of the Deccan Traps [4]. This period, spanning approximately 146 to 65 million years ago, concluded with an intense outpouring of basaltic lava through fissure-type eruptions [3]. These eruptions created a massive lava plateau covering west-central India, with thicknesses reaching up to 3,000 meters near the Mumbai coast [4]. The volcanism is closely associated with the Cretaceous-Paleogene boundary and is often linked to the mass extinction events of that era [2]. The tectonic activity involved the reactivation of rift zones like the Narmada-Tapi and Cambay rifts in the late Cretaceous, facilitating the rise of magma from the Earth's interior to the surface [3].

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 1: Geological Structure and formation of India > THE CRETACEOUS SYSTEM (THE DECCAN TRAP) > p. 19
2. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 1: Geological Structure and formation of India > THE CRETACEOUS SYSTEM (THE DECCAN TRAP) > p. 20
3. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 2: Physiography > 6. The Deccan Trap > p. 51
4. [2] https://www.sciencedirect.com/science/article/abs/pii/S092181811300115X