If we were wondering how come life took so long to recuperate after the Permian 252ish Mya, here's the Carnian Extinction. Or "Pluvial Episode" within that 237-27 Mya span, 234-2 Mya. "Pluvial" means it rained for two million years. They say Wrangellia Large Igneous Province - igneous means volcano.
Asteroids did hit - later, during the dark age. Manicouagan.
So they had good records for the Carnian. They didn't, perhaps, have the perspective for the Carnian, given that dark age later.
As mass-extinctions go, I don't think the Carnian Pluvial will be unseating the Big Five. It looks about the same tier as Paleocene / Eocene, or maybe the Late Permian (as opposed to, End Permian). Leaving aside the one we're currently in.
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