Re: Asteroid impacts


johnwl4@xxxxxxx wrote:
OT: Cindy Looy and others found that relatives of the quillwort
were
by far the most common plants for maybe 5 million years after the
Permian-Triassic boundary, which implies that something was suppressing
plants that couldn't reproduce by apomixis.
The Deccan Traps or geysers associated with them maybe.
OTOH, there were at least two blooms of -what - red tide (can' t
remember the name), which implies a couple of serious blows to ocean
life. Maybe the Antarctic bolide, and Bedout. The Antarctic one
also might have caused the start of the breakup of Pagaea.
This was kicked around on a Yahoo group on extinctions.
Regards
John GW

That's phytoplankton - left traces of two blooms in the rocks.
OTOH, Wang, I think, found the loss of ocean life was very sudden very
sudden. Few thousand years, maybe.
John GW

.

Relevant Pages

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