8 Sep
2008
8 Sep
'08
3:11 p.m.
On Mon, Sep 08, 2008 at 05:43:12PM -0400, Sridhar Ayengar wrote:
bfranchuk at jetnet.ab.ca wrote:
It takes even longer. Most black coal dates back to the Carbon era
(about 300 .. 360 million years ago). Brown coal, which hasn't changed
that much from the original wood-in-a-swamp mix (we sure found plenty of
chunks of wood in it) is much younger, from the Tertiary era (about 2.6
to 65 million years ago).
Regards,
Alex.
--
"Opportunity is missed by most people because it is dressed in overalls and
looks like work." -- Thomas A. Edison
Chuck Guzis wrote:
I don't believe it takes quite that long. And to make coal...
You find a old swamp, and cover it for few million years ...