The Indian tectonic plate split from the ancient continent of Gondwanaland. The collision of the Indian plate with the Eurasian plate created the Himalaya Mountains.
Deccan Traps volcanism between 67 and 65 million years ago was formed by the Reunion hotspot.
Volcanoes in the Andaman Islands are the result of subduction volcanism.
Deccan Traps
Narcondum
Barren
Island
Barren 1
Unnamed volcano east of Pondicherry