Obviously, an event of this magnitude would have a huge effect on the planet. I’m just not a good enough scientist to figure out how this event would trigger the Quaternary and the pattern of glacial/interglacial periods we’ve had since.
It wouldn’t — it triggered one glaciation, and each glaciation was triggered by a different impact. Impacts don’t happen cyclically or on a schedule, they just happen when they happen. :’) And it’s stuff like that which cause people to call me Mister Sunshine.