In the article they mention that all eukaryotic algae are descended from fresh water algae, and that they may have survived in the glacial pools
that melt and form on the surface of ice sheets. Single celled plant
life may have died out in the ice covered oceans.
https://www.science.org/content/article/life-may-have-survived-far-north-equator-during-snowball-earth
Science has a news article about where life may have survived on ice
ball earth 650 million years ago when most of the planet was covered by frozen ice sheets. Life was limited at this time to single celled
lifeforms, bacteria and eukaryotes.
In the article they mention that all eukaryotic algae are descended from fresh water algae, and that they may have survived in the glacial pools
that melt and form on the surface of ice sheets. Single celled plant
life may have died out in the ice covered oceans.
Ron Okimoto
On Saturday, April 8, 2023 at 4:30:15?PM UTC-7, RonO wrote:
https://www.science.org/content/article/life-may-have-survived-far-north-equator-during-snowball-earth
Science has a news article about where life may have survived on ice
ball earth 650 million years ago when most of the planet was covered by
frozen ice sheets. Life was limited at this time to single celled
lifeforms, bacteria and eukaryotes.
In the article they mention that all eukaryotic algae are descended from
fresh water algae, and that they may have survived in the glacial pools
that melt and form on the surface of ice sheets. Single celled plant
life may have died out in the ice covered oceans.
Ron Okimoto
The actual article referenced in the news article is
https://www.idrive.com/idrive/sh/sh?k=q8c0q3w2h7
The "glacial pools" is Hoffman's suggestion "Other scientists aren’t yet convinced, however. Climate simulations
have trouble creating even an ice-free equator during Snowball Earth periods. The possibility that there was
uncovered ocean outside the tropics “makes this thing really difficult to swallow,” says Paul Hoffman, a geologist
at Harvard University who pioneered the Snowball Earth hypothesis."
On Sat, 8 Apr 2023 21:23:17 -0700 (PDT), erik simpson
<eastsi...@gmail.com> wrote:
On Saturday, April 8, 2023 at 4:30:15?PM UTC-7, RonO wrote:
https://www.science.org/content/article/life-may-have-survived-far-north-equator-during-snowball-earth
Science has a news article about where life may have survived on ice
ball earth 650 million years ago when most of the planet was covered by >> frozen ice sheets. Life was limited at this time to single celled
lifeforms, bacteria and eukaryotes.
In the article they mention that all eukaryotic algae are descended from >> fresh water algae, and that they may have survived in the glacial pools >> that melt and form on the surface of ice sheets. Single celled plant
life may have died out in the ice covered oceans.
Ron Okimoto
The actual article referenced in the news article is
https://www.idrive.com/idrive/sh/sh?k=q8c0q3w2h7
The "glacial pools" is Hoffman's suggestion "Other scientists aren’t yet convinced, however. Climate simulationsGlacial pools don't require an ice-free conditions anywhere. They
have trouble creating even an ice-free equator during Snowball Earth periods. The possibility that there was
uncovered ocean outside the tropics “makes this thing really difficult to swallow,” says Paul Hoffman, a geologist
at Harvard University who pioneered the Snowball Earth hypothesis."
form on glacial ice surfaces. Micro-organisms thaw out from the ice
and reproduce in the pools. This happens seasonally on Greenland
glaciers.
Also, studies of Antarctic glaciers show that light penetrates through
thick ice sufficient to support life underneath.
--
You're entitled to your own opinions.
You're not entitled to your own facts.
On Sunday, April 9, 2023 at 2:30:14?AM UTC-7, jillery wrote:
On Sat, 8 Apr 2023 21:23:17 -0700 (PDT), erik simpson
<eastsi...@gmail.com> wrote:
On Saturday, April 8, 2023 at 4:30:15?PM UTC-7, RonO wrote:Glacial pools don't require an ice-free conditions anywhere. They
https://www.science.org/content/article/life-may-have-survived-far-north-equator-during-snowball-earth
Science has a news article about where life may have survived on ice
ball earth 650 million years ago when most of the planet was covered by >> >> frozen ice sheets. Life was limited at this time to single celled
lifeforms, bacteria and eukaryotes.
In the article they mention that all eukaryotic algae are descended from >> >> fresh water algae, and that they may have survived in the glacial pools >> >> that melt and form on the surface of ice sheets. Single celled plant
life may have died out in the ice covered oceans.
Ron Okimoto
The actual article referenced in the news article is
https://www.idrive.com/idrive/sh/sh?k=q8c0q3w2h7
The "glacial pools" is Hoffman's suggestion "Other scientists aren’t yet convinced, however. Climate simulations
have trouble creating even an ice-free equator during Snowball Earth periods. The possibility that there was
uncovered ocean outside the tropics “makes this thing really difficult to swallow,” says Paul Hoffman, a geologist
at Harvard University who pioneered the Snowball Earth hypothesis."
form on glacial ice surfaces. Micro-organisms thaw out from the ice
and reproduce in the pools. This happens seasonally on Greenland
glaciers.
Also, studies of Antarctic glaciers show that light penetrates through
thick ice sufficient to support life underneath.
All true, but the "news" article does a poor job of addressing the main points of
the cited article: fossil evidence from black shales interleaved with diamictite in
the Nantuo formation, found in mid-latitude as well as tropic latitudes.
On Sun, 9 Apr 2023 08:05:06 -0700 (PDT), erik simpson
<eastsi...@gmail.com> wrote:
On Sunday, April 9, 2023 at 2:30:14?AM UTC-7, jillery wrote:
On Sat, 8 Apr 2023 21:23:17 -0700 (PDT), erik simpson
<eastsi...@gmail.com> wrote:
On Saturday, April 8, 2023 at 4:30:15?PM UTC-7, RonO wrote:Glacial pools don't require an ice-free conditions anywhere. They
https://www.science.org/content/article/life-may-have-survived-far-north-equator-during-snowball-earth
Science has a news article about where life may have survived on ice >> >> ball earth 650 million years ago when most of the planet was covered by
frozen ice sheets. Life was limited at this time to single celled
lifeforms, bacteria and eukaryotes.
In the article they mention that all eukaryotic algae are descended from
fresh water algae, and that they may have survived in the glacial pools
that melt and form on the surface of ice sheets. Single celled plant >> >> life may have died out in the ice covered oceans.
Ron Okimoto
The actual article referenced in the news article is
https://www.idrive.com/idrive/sh/sh?k=q8c0q3w2h7
The "glacial pools" is Hoffman's suggestion "Other scientists aren’t yet convinced, however. Climate simulations
have trouble creating even an ice-free equator during Snowball Earth periods. The possibility that there was
uncovered ocean outside the tropics “makes this thing really difficult to swallow,” says Paul Hoffman, a geologist
at Harvard University who pioneered the Snowball Earth hypothesis."
form on glacial ice surfaces. Micro-organisms thaw out from the ice
and reproduce in the pools. This happens seasonally on Greenland
glaciers.
Also, studies of Antarctic glaciers show that light penetrates through
thick ice sufficient to support life underneath.
All true, but the "news" article does a poor job of addressing the main points ofprevious objection stated above accurately describes neither the cited
the cited article: fossil evidence from black shales interleaved with diamictite in
the Nantuo formation, found in mid-latitude as well as tropic latitudes. It's unsurprising that "news" articles fail to accurately describe scientific papers. However, if that's your objection now, then your
paper nor the news article.
My point is there are two separate environments for life sans ice-free conditions:
1. life in surface glacial pools, and
2. life underneath glaciers, in pools between the ice and ground.
ISTM surface pools are unlikely to contribute to sedimentary layers.
OTOH the scientific paper speculates of a 3rd environment:
3. ice-free regions at mid-latitudes.
I don't know enough to have an informed opinion whether the Nantuo
formation distinguishes between 2 and 3.
--
You're entitled to your own opinions.
You're not entitled to your own facts.
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