Re: Alternative interpretation of the KT boundary and dionsaur die-off

On 5 Oct, 15:39, Willie.Moo...@xxxxxxxxx wrote:
Consider this URL

http://www.pbs.org/wgbh/nova/gamma/milkyway2.html

Could some die-offs be due to the Earth intercepting gamma ray bursts
from nearby neutron star pairs?

How much of the evideence of a KT type event could be produced by
gamma ray bursts?

What distinguishing features would a gama ray burst die off have that
a asteroid impact would not have?

Basically plant life. With a gamma ray burst you would expect plant
life to be (initially) the most severly hit. You see all the leaves
need to be exposed to the Sun for photosynthesis. Furthermore you
would expect cactal type plants and arctic mosses to survive
selectively. We would expect to see coal deposits dating from this
era.

In fact KT hit animals more severly than plants. Of course animals
live off plants so animals would have died. One would have expected
the whole Earth to have had a desert appearance.

In fact flowering plants eveloved during the Cretaceous and were not
destroyed. I would have expected them to be.

You will recall that when I was discussing energy, the Israeli pure
CO2 algal system for producing oil, I went over the basic facts of
plant biology and the trade off between water and CO2. The desert
plants with low growth rates and thick protection would have been the
ones to survive. There is little indication of this.

Not completely infallible, but these are the indicators. Best tests
are the DNA records of the different species. Fossilization is rare
and is in consequence less reliable.


- Ian Parker

.

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