[null and void]

I wonder if they are assuming 14.7 psi as one atmosphere?

I’m also wondering what percentage of the atmosphere and hydrosphere would be permanently blasted into space if you abruptly opened a 120 mile wide crater down to magma at a shallow ocean margin?

Seems to me that would create a superheated seawater steam jet that would rocket into space for days if not weeks.

The net pressure and available atmospheric oxygen before Chicxulub might well have been significantly higher.

[SunkenCiv]

Thanks for the great comments, all. Thanks PIF for that link. And I think Medved in absentia for all those old topics about how giant critters could function. :’)

There’s been some suggestion that there was a higher CO2 level in the atmosphere (and not just a little higher, orders of magnitude more) in order to A) get funding for research from the “global warming” agenda, and B) try to explain how dinos were found from pole to pole (drifting continents can’t account for it, the former dino ranges weren’t in the temperate or subtropical or tropical zones).

[El Cid]

I’m also wondering what percentage of the atmosphere and hydrosphere would be permanently blasted into space if you abruptly opened a 120 mile wide crater down to magma at a shallow ocean margin? Seems to me that would create a superheated seawater steam jet that would rocket into space for days if not weeks.

Walter Brown's Hydroplate model?

Hydroplate