During the Permian mass extinction also known as the great dying, comprising 96% of marine species and 70% of the terrestrial vertebrates became extinct.
Possibly much loss of biodiversity due to the major events like the large meteor impacts, massive volcanic eruptions, associated with climate changes that brought large underwater methane gases into action.
It took place about approximately 252 million years ago. Release of various harmful gases like Hydrogen sulfide and the Siberian Traps eruptions.
The Oceanic plate crust is converging with the continental crust along the west coast
Explanation:
The example of the ocean and the continent convergence as the crust which is denser gets subducted into the mantel and this occurs along the trenches and is a part of the volcanic coastal mountains like those of the Pacific and the North American plate. Formation of the destructive plate margin as convergence boundary.