It's been a while since I got my degree but I was taught that coal formation is land based (swamp) or sometimes coastal/marine delta with the source being terrestrial plant material and oil is mostly marine based from marine organisms though some is land based.
--- In
geology2@yahoogroups.com, Kim Noyes <kimnoyes@...> wrote:
>
> Most coal comes from marine life, not land-based life.
>
> On Sun, Jan 23, 2011 at 11:13 PM, Dean Seeley <wholead@...> wrote:
>
> >
> >
> > Fascinating! Now I wonder if there was enough coal in the areaa 250 million
> > years ago to get tht effect. Had life been around long enough - swamps and
> > that sort of coal precursor - to make enough carbon to create the coal? The
> > planet has been around a long time. Hmmm...
> >
> > -----Original Message-----
> > Date: Sunday, January 23, 2011 7:59:01 pm
> > To: "Geology2" <
geology2@yahoogroups.com <geology2%
40yahoogroups.com>>
> > From: "Lin Kerns" <linkerns@... <linkerns%
40gmail.com>>
> > Subject: [Geology2] World's Largest Extinction Explained by World's Largest
> > Volcanic Eruption
> >
> > World's Largest Extinction Explained by World's Largest Volcanic Eruption
> >
> > Published January 23, 2011
> >
> > [image: The shores of Buchanan Lake, Axel Heiberg Island, Nunavut, where
> > researchers have discovered sediments deposited shortly after the worst
> > extinction event in Earth's history.]
> >
> > Steve Grasby, University of Calgary/NRCan
> >
> > The shores of Buchanan Lake, Axel Heiberg Island, Nunavut, where
> > researchers
> > have discovered sediments deposited shortly after the worst extinction
> > event
> > in Earth's history.
> >
> > It must have been one hell of an eruption.
> >
> > About 250 million years ago, hundreds of millions of years before the
> > dinosaurs were wiped from the face of the planet, 95 percent of the
> > primitive life developing in the sea was wiped out -- and 70 percent of the
> >
> > critters evolving on the Earth's surface. And no one knew why -- until now.
> >
> >
> > Researchers at the University of Calgary have discovered evidence
> > suggesting
> > that massive volcanic eruptions at the time burnt significant volumes of
> > coal, produ
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