[Rockhounds] Younger Dryas Impact Hypothesis and Missoula (Spokane) Megafloods

[Paul]

Doris wrote,

 >What this means is that tsunamis occur often in that region
 >and for more than one region - so we can't use them to
 > disprove that an impact occurred. 
https://en.wikipedia.org/wiki/1700_Cascadia_earthquake
 >In case you forgot already - or never read before sending

The “megafloods,” which I referred to in my original post
are **not** the Cascadia tsunamis. The “megafloods” that I
discussed in my original post are instead the Missoula
(Spokane) Floods. Since the last of the Lake  Missoula
outburst floods occurred about 14.7 ± 1.2 ka and the
youngest of the dated megaflood(s) (14.0 ± 1.4 ka to
14.4 ± 1.3 ka) likely came from glacial Lake Columbia, they
far too old to be associated any type of event at the start
of the Younger Dryas.

The paper is:

Balbas, A.M., Barth, A.M., Clark, P.U., Clark, J., Caffee,
M., O’Connor, J., Baker, V.R., Konrad, K. and Bjornstad,
B., 2017. 10Be dating of late Pleistocene megafloods
and Cordilleran Ice Sheet retreat in the northwestern
United States. Geology, 45(7), pp.583-586
<http://iafi.org/wp-content/uploads/Balbas2017-Missoula-Flood-Chronology.pdf>
<http://iafi.org/iafi/resources/>
<http://iafi.org/iafi/beryllium-10-dating-of-late-pleistocene-megafloods-and-cordilleran-ice-sheet-retreat/>

The original post is "Younger Dryas Impact Hypothesis
and Missoula (Spokane) Megafloods" at:
<http://rockhounds.drizzle.com/pipermail/rockhounds_rockhounds.drizzle.com/2017-October/005211.html>

The pertinent Wikipedia page is "Missoula Floods" at:
<https://en.wikipedia.org/wiki/Missoula_Floods> .

The Cascadia tsunamis and Missoula Floods / Megafloods
are very different phenomenon.

Yours,

Paul H.