The oceanic part of the Indian plate slides under the Eurasian plate. This leads to subduction volcanism.
oceanic rocks
Sediments of the former Tethys Oceanare pushed up between the two continental plates. As a result fossils of ammonites and sea lilies can be found at high altitudes.
subduction stops
The oceanic lithosphere tears away from the continental plate. The continental lithosphere is too light and thick to undergo subduction. The end of subduction also means the end of volcanism.
