The greatest mass extinction in Earth’s history also may have been one of the slowest, according to a study that casts further doubt on the extinction-by-meteor theory. ...
The decline began millions of years before the disappearance of 90 percent of Earth’s species at the end of the Permian era, Powers shows in her study.
More damaging to the meteor theory, the study finds that organisms in the deep ocean started dying first, followed by those on ocean shelves and reefs, and finally those living near shore.
“Something has to be coming from the deep ocean,†Powers said. “Something has to be coming up the water column and killing these organisms.â€
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Permian mass extinction & Hydrogen Sulphide.
Submitted by Matt on Wed, 10/31/2007 - 16:00.The greatest mass extinction in Earth’s history also may have been one of the slowest, according to a study that casts further doubt on the extinction-by-meteor theory.
...
The decline began millions of years before the disappearance of 90 percent of Earth’s species at the end of the Permian era, Powers shows in her study.
More damaging to the meteor theory, the study finds that organisms in the deep ocean started dying first, followed by those on ocean shelves and reefs, and finally those living near shore.
“Something has to be coming from the deep ocean,†Powers said. “Something has to be coming up the water column and killing these organisms.â€
That something probably was hydrogen sulfide
http://www.eurekalert.org/pub_releases/2007-10/uosc-mnl102407.php