Siberian Flood Basalts – MIT: About 252 million years ago, the largest mass extinction and the largest volcanic eruptions in Earth history occurred apparently synchronously.

Massive volcanic eruptions set the stage for dinosaurs’ demise http://arstechnica.com/science/2014/12/massive-volcanic-eruptions-set-the-stage-for-dinosaurs-demise/

Bill McGuire: Modelling suggests with ice cap melt, an increase in volcanic activity http://climatestate.com/2014/10/16/methane-hydrate-destabilisation-is-clearly-a-real-worry-particularly-in-the-context-of-warming-ocean-waters-in-the-east-siberian-continental-shelf/

• Siberian Traps http://en.wikipedia.org/wiki/Siberian_Traps
• Deccan Traps http://en.wikipedia.org/wiki/Deccan_Traps