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by EdwardDiego 2873 days ago
Sure, started, but...

http://science.sciencemag.org/content/350/6256/76

> The existing Deccan Traps magmatic system underwent a state shift approximately coincident with the Chicxulub impact and the terminal-Cretaceous mass extinctions, after which ~70% of the Traps' total volume was extruded in more massive and more episodic eruptions. Initiation of this new regime occurred within ~50,000 years of the impact, which is consistent with transient effects of impact-induced seismic energy.

Then there's the possibility of another impactor coincident in time to Chicxulub: https://en.wikipedia.org/wiki/Shiva_crater