Does Dark Cloud cause mass extinctions?

And the asteroid doesn't explain how marine vertebrates and invertebrates went extinct. You get iridium there as well. Actually, the iridium layer is really thick (I've seen an exposure in person) and to get a layer that thick it has to be longer than what would have happened in a single impact.

I haven't heard about this dark cloud theory before. But it does explain how to get a thicker iridium layer AND affect land and marine life.

That's why scientists look at the extinction at K-Pg boundary as a series of events with the asteroid impact as the death blow. One other major environmental disturbance is the Deccan Traps eruptions in India at that time. Just to give a little insight, there were eruptions that were similar to these, but on a larger scale (more active, larger area) and that caused an extinction that was greater than any on Earth (End-Permian).

I just don't necessarily trust a geologist to do astronomy. Unless they're astrogeologists! Haha.

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How would a cloud of dust effect the earth unless it blocked the sun.

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Lack of breathable oxygen?

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How would a cloud of dust effect the earth unless it blocked the sun.

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How do miners drown in their own blood because of breathing in airborne silica dust they kick up from mining?

And the cloud would have blocked the Sun.

Ok. Do I have to explain to you people how the atmosphere works? The dust would simply burn up in the atmosphere. The light show would've been epic though.

clearly, you havent been educated on the OT

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dark cloud could have driven an environmental catastrophe

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Yes please explain