Re: [Phys-L] snowball Earth

[bernard cleyet <bernard@cleyet.org>]

Evidently I’m the only one who subscribes to “The Atlantic”  the march issue has a very long article:  “The Dark Secrets of the Earth’s Deep Past” by Peter Brannen. [1]  PP 60=>75  covers 0 to 60m years ago, 180 => 1400 ppm CO2 

bc  …      has little memory; required searching (duckduckgo) for many minutes to find the magazine, which he read (paper copy) yesterday!    (At least he remembered reading the article! He thought it was in “Wired” or "The New Yorker”..)


[1]   https://www.colorado.edu/cej/2019/02/18/five-questions-fellows-peter-brannen <https://www.colorado.edu/cej/2019/02/18/five-questions-fellows-peter-brannen>   



> On 2021/Apr/15, at 11:31, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:
>
> On 4/15/21 9:26 AM, Anthony Lapinski asked about:
>
> > snowball Earth 
>
> See
>  https://www.climate.gov/news-features/climate-qa/whats-coldest-earths-ever-been
> and references therein.
>
> It discusses in broad terms the evidence, including "glacial erratic"
> rocks. Also plausibility calculations, considering the makeup of the
> atmosphere. Also the role of vulcanism.


IIRC, all above covered by P. Brannen.  He has a book also:   


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