[tremon]

so they definitely happened concurrently

Do we know for sure that the volcanism in the Deccan traps wasn't caused/triggered by the asteroid impact? I know they're pretty much located at the opposite ends of the world, so could the shockwaves from the initial impact have created an amplified node at the other side?

(edit: wikipedia[0] says it's inconclusive:

> Although the Deccan Traps began erupting well before the impact, [..] the impact may have caused an increase in permeability that allowed magma to reach the surface and produced the most voluminous flows, accounting for around 70% of the volume

[0] https://en.wikipedia.org/wiki/Deccan_traps#Chicxulub_crater )

[jjk166]

While there are many large igneous provinces similar to the deccan traps (for example the siberian traps associated with the Great Dying), we don't really have any good evidence for large asteroid impacts comparable to chicxulub so it's tough to say with confidence what effects were directly the result of it versus coincidental.

[tremon]

Well... I did some digging.

The Great Dying you speak of happened to coincide with an asteroid crater off the coast of Antarctica [0]. I haven't been able to find an accurate globe of the continents at that time ([1] doesn't show the poles in great detail), but it does look like eastern Siberia was at the antipode of the Australia/Antarctica boundary. So the theory seems to hold up -- at least from the confines of my armchair, that is.

[0] https://www.universetoday.com/8221/huge-asteroid-crater-in-a...

[1] https://resize.hswstatic.com/w_907/gif/cretaceous-map.jpg