Re: tsunami western interior seaway

[Phil Bigelow <bigelowp@juno.com>]

"James R. Cunningham" <jrccea@bellsouth.net> writes:
> Are there any chronospecies that can be associated with the Manson
> impact tsunami of about 74Mya?
> 
> And has anyone seen estimates of the effect of the
> Oklahoma-Arkansas-Missouri shelf on the Wetumpka tsunami of about 
> 81mya?


Here is a paper that discusses the sedimentologic effects of the impact:

Izett, G.A., W.A. Cobban, J.D. Obradovich, and M.J. Kunk. 1993. The
Manson impact structure: Ar-40/Ar-39 age and its distal impact ejecta in
the Pierre Shale in southeastern South Dakota. Science 262: 729-732.

Izett et al.'s  bibliography should contain some good references on
Manson's deposits and the specific biozone in other parts of the Midwest.

<pb>
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