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Re: News from the Island of Kalu

From:Eldin Raigmore <eldin_raigmore@...>
Date:Monday, June 19, 2006, 22:34
On Mon, 19 Jun 2006 18:26:06 -0400, Eldin Raigmore
><eldin_raigmore@...> wrote:
>*Here* in OurTimeLine 70,000 to 75,000 years ago a RealLive "SuperVolcano" >erupted -- or maybe that should be, "a volcano 'supererupted'" -- under >Lake Toba on Sumatra in Indonesia. (? do I have that right? Maybe >it's "Tosa"). (That was about 71,500 BCE or about 72,000 BCE). > >(Or maybe it didn't). > >It spread a cloud of sulphuric acid that reduced the amount of sunlight >reaching the Earth's surface for 50 years
(or maybe just 7 years),
>and triggered a "mini-Ice Age" >that lasted 1000 years.
(or at least cooled the Earth 3 to 9 degrees Celsius for some centuries.)
>(Or maybe it didn't). > >It reduced the Earth's human population by 40%, or to about 10,000 >individuals. (Or didn't). (This event is one of those called "a population >bottleneck", but ordinarily a "population bottleneck" refers to a die-off >of 50% or more of the population. Perhaps I have that percentage wrong?)
Some say it reduced the human population from over 100,000 to less than 2,000. That would be at least a 98% reduction -- definitely a "population bottleneck".
> >Was the recent event in Kalu similar? > >----- >eldin