Ahem, I see that UFO up there over that picture of Chimney Rock.
I missed that...
http://users.on.net/~mkfenn/Catastrophes.htm
Legends describe what happened:
“The water having poured over the land (2km thick ice sheet collapses into the sea),
human dwellings disappeared. The wind carried them away.
They fastened several boats to one another.
The waves traversed the Rocky Mountains.
A great wind drove them.
Presently the moon and the sun disappeared (atmospheric dust, post impact).
Men died of a terrible heat (firestorms post impact).
They also perished in the waves.
Men bewailed what happened.
Uprooted trees floated about in the waves.
Men having fastened boats together trembled with cold.
The above translation is attributed to the native tribe called the Esquimaux of Canada. Just one of hundreds of flood traditions that many scholars have collected.
Also from further south in the Carolinas we have the following very interesting tradition:
“a star fell to the earth, and rain soon followed (oceanic impact, causing vast amounts of water to evaporate).
Days and days of rain quenched the fire.
Great holes burned in the earth by the fire were filled,
forming a great inland sea...