I would imagine that when the meteor hit, it would have triggered massive volcanism all over the planet from the force of the impact on the crust................
There’s actually another meteor crater (Shiva?) near India from about the same time, more likely to have uncorked the volcanos.
And weren’t the flood basalt lava flows going great guns in Siberia around the same time? Looks like the egg was hit really hard and sprung a few leaks.