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K-T Edens, heartburn, & baby T-rexes

Today I visited Dann's site for the first time, and I am very impressed. Will definitely be making return visits in the future. Very COOL site.
Dann's Sinosauropteryx has the sort of covering I might expect in a baby tyrannosaur. And since these groups are closely related, it would not surprise me if baby tyrannosaurs looked similar to adult Sinosauropteryx, Compsognathus, etc.
As for the K-T "edens", I think valleys with hot springs or other volcanic activity would indeed be very good places to have been----HOWEVER, only those which were associated with alkaline volcanoes and alkaline soils (which would have helped neutralize acid rain). Areas associated with acidic volcanoes would have been bad for most life if stronger acid came in the form of acid rain. In other words, most of the K-T edens would probably have had a pH of 7.5 or higher (well above 7.5 for sites in the Northern Hemisphere).
When the Earth had a major case of global "heartburn" at K-T, relief would have been spelled C-A-L-C-I-U-M. Even r-o-l-a-i-d-s or tums wouldn't have helped unless you had a burrow or cave lined with many thousands of them.
Plop Plop, Fizz Fizz,
Oh what a relief it is,
----Ken (sings and sighs)
From: Dann Pigdon <dannj@alphalink.com.au>
Reply-To: dannj@alphalink.com.au
To: dinosaur@usc.edu
Subject: Re: Eden K-T survival
Date: Tue, 26 Feb 2002 10:53:45 +1100

Jerzy Dyczkowski wrote:
> I wondered how to explain extinction of all non-avian dinosaurs during the
> K-T and survival of ca.20 groups of modern birds and several of mammals.
> Suppose, that very small pockets of habitat could survive the K-T
> catastrophe much better than Earth on average. They could be protected by
> unusual surroundings and their ecosystems already adapted to difficult
> conditions. Such places could be refuges or "edens" for relatively diverse
> and vulnerable small animals (amphibians, turtles, birds, mammals etc.)
> when all large animals would be extinct. One example of such a refuge
> could be small mountain valley in area of generally high volcanic
> activity.

Or southern Australia. Where are good late Maastrichtian deposits when
you need them? :)



Dann Pigdon                   Australian Dinosaurs:
GIS Archaeologist           http://www.geocities.com/dannsdinosaurs
Melbourne, Australia        http://www.alphalink.com.au/~dannj/

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