Re: extinction

[Simonyi <huibm012@attglobal.net>]

Mr Pigdon wrote:
"David Marjanovic wrote:
> 
> Abnormally thick eggshells occur at any time in any place, and are
> not concentrated at the K-T boundary; most importantly, they can result from
> all sorts of stress, by no means only from Ir!

I've heard about high Selenium levels in Deccan lava, and how the
element causes severe problems to developing bird embryos (and
presumably dinosaurs). Does anyone have any references? I remember
reading that Selenium levels were quite high in French sauropod eggs
during the Late Maastrichtian, and that Deccan Selenium contamination
may have reduced dinosaurian reproductive rates prior to the
end-Cretaceous impact. Exactly how would Selenium get out of the lava
and into the biosphere though?"

My answer:
1 About the effect of selenium I red:
Plants are able to suck up compounds of selenium and build into their
proteins instead sulfur. These plants and animals who are eating these
plants will be ill. For example: Hoof of cows will be soft and hairs will
fall out. Few people died from selenium in Dakota. Symptoms of the
selenium-poisoning is same as arsenic-poisoning.

2. Features of selenium:
The boiling point is 688 Celsius therefore when lava is flowing out then
selenium is in vaphor state. If the temperature is higher than 300 Celsius
the selenium with the oxigen of the air can fast compose SeO2. SeO2 is
sublimating at 315 Celsius therefore the selenium-vaphor get away from lava
produce vaphor of SeO2. The vaphor (and after the cool down the powder) of
SeO2 can flying with the wind away. The SeO2 is easy dissolving in water
and compound H2SeO3. H2SeO3 is medium strong acid therefore is easy
compound salts. It can compound selenite-salt from carbonates,
hydro-carbonates. These salts are good soluble in water and they can get in
to plants.

Endre Simonyi