jan 1, 10800 BC - Younger Dryas Comet Impact

Description:

The Younger Dryas impact hypothesis or Clovis comet hypothesis posits that fragments of a large (more than 4 kilometers in diameter), disintegrating asteroid or comet struck North America, South America, Europe, and western Asia about 12,800 years ago.

The Rio Cuarto craters in Argentina were produced approximately 10,000 years ago, at the beginning of the Holocene. If proved to be impact craters, they would be the first impact of the holocene.

https://en.wikipedia.org/wiki/Impact_event

https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis

https://www.pnas.org/content/104/41/16016