[Scully]

The regional effects from Chicxulub can be seen in turbidites as far away as Texas. Neither Chicxulub nor the Deccan may be responsible for the K-T extinction event either individually or collectively. So where did the iridium come from?

I did a search, sorry of this is a repeat.

[Scully]

ping

[Just another Joe]

So where did the iridium come from?

“The original studies of the clay layer found at the K-T boundary assumed much or all of this layer was derived from fine impact dust,” he said. “More recent studies of this layer have shown this not to be the case.

That was my question also. Is there a layer of iridium dust so thick in outer space that as the earth drifted through it placed a layer on the surface?
That would be an awfully large, awfully thick cloud of dust, no?
You would think if it was that big and thick that astronomers would be able to see it, wouldn't you?

Or was it the fallout from two alien races having a war on earth? Nuetral ground so they don't screw up their own planets.

We may never know.

[ThinkPlease]

I think what they are saying is not that there wasn't dust created by the impact, but that there wasn't enough dust created of a sufficient particle size to prevent plants from photosynthesizing sunlight.

A subtle difference.

[blam]

Asteroid May Be Gold Mine

[green team 1999]

aahhh,x-files section.

[LibWhacker]

I don't think they need the dust hypothesis to account for the K-T extinction. The asteroid threw up trillions tons of molten hot rock, which then rained down on the planet for days afterward. Being anywhere on the earth's surface would be like being under a broiler. Average surface temperatures were hotter than your oven . . . At least that's what I've read . . .

[woollyone]

Extinctions: Dust Didn't Do It"...think global flood

[Psycho_Bunny]

Hm. Sloppy article. Factors critical to the theory aren't even mentioned, such as velocity.

When talking about medium sized impacts, speed matters.

[blam]

Comets And The Bronze Age Collapse

[blam]

Comet Phaethon's Ride