[AntiGuv]

What about the "Mini-Ice Age" which occured in the Late Middle Ages? Could something like this have cause what we would now call nuclear winter effect?

The practical answer is: No. You need a very large strike on land to kick up enough debris to affect the climate for decades. That leaves a big mark, and creates a big boom, the kind of mark and boom people notice and write about...

In addition to that, a meteor that creates a huge tidal wave by definition falls into the ocean. Such a meteor kicks up no dust. You can't have it both ways..

[AntiGuv]

I meant post #24 for you.

[AntiGuv]

PS. Unless the meteor is so big that it vaporizes the ocean water and kicks up the ocean floor into the atmosphere. Then you could get both the (spectacular) tidal wave and an extended climate change, but rest assured that such a strike in 1178 in the Eastern Pacific Ocean would be readily apparent even today, assuming we weren't extinct..

[blam]

"In addition to that, a meteor that creates a huge tidal wave by definition falls into the ocean. Such a meteor kicks up no dust. You can't have it both ways."

Sure you can. Swarms!

Have you ever seen the Carolina Bays?