Carolina Bays and Nebraska Platte River depressions point to Saginaw Bay, Wisconsin as epicenter of one of the impacts. The ice was a mile thick there/then and ejecta was made up of ice.
There’s iridium all over the world at the 13,000 year level of soil.
The Clovis flint knap arrow point making indians all perished at this time.
..Saginaw Bay, Wisconsin as epicenter of one of the impacts.”
Saginaw bay, WI, or Saginaw bay, MI?