[Ernest_at_the_Beach]

Snowball Earth: New Evidence Hints at Global Glaciation 716.5 Million Years Ago

In this photo from Canada's Yukon Territory, an iron-rich layer of 716.5-million-year-old glacial deposits (maroon in color) is seen atop an older carbonate reef (gray in color) that formed in the tropics. (Credit: Francis A. Macdonald/Harvard University)

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This work was supported by the Polar Continental Shelf Project and the National Science Foundation's Geobiology and Environmental Geochemistry Program.

[ETL]

"In this photo from Canada's Yukon Territory, an iron-rich layer of 716.5-million-year-old glacial deposits (maroon in color) is seen atop an older carbonate reef (gray in color) that formed in the tropics"

The idea being that these rather large deposits, boulders, etc, were embedded in advancing glaciers, portions of which stretched out into the sea. Then, when the ice melted, they were dropped onto the seafloor (carbonate reef).

[steelyourfaith]

Thanx !
Glaciers, list of currently advancing glaciers

 

Beam me to Planet Gore !

[Marine_Uncle]

Interesting. But the references made to CO2 somehow warming things up is BS.

[SunkenCiv]

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[Miss Marple]

I ran across a special filmed in Denmark on YouTube. It is called "The Cloud Mystery." I liked it so much I bought a book by the same scientist called The Chilling Stars.

The scientist is named Svenmark; he's a Dane. Here is his theory which seems pretty solid:

Cosmic rays are necessary for cloud formation. When they hit the earth's atmosphere they produced charged droplets which attract other molecules of water, forming clouds. More cosmic rays mean more clouds. More clouds means more heat is reflected back into space, causing cooling.

When the sun is active, it produces a stronger magnetic field which deflects some of the cosmic rays from earth, making fewer clouds and more heat. When the sun is "lazy" (like right now) more cosmic rays reach the earth and there are more clouds, hence cooler.

He had a pretty convincing correlation between solar activity and temperature, and also did experiments producing clouds in a chamber with cosmic-type rays.

He even correlated ice ages with cosmic rays. The solar system orbits around the Milky Way over hundreds of millions of years. When the solar system passes through an area of heavy star concentration, the cosmic rays produced by the extra stars overwhelm any effect the sun has, and the earth cools significantly, causing ice ages. He had done work with an Israeli astronomer to correlate the times of ice ages with passage through those star belts.

I highly recommend looking for that special on line. It has English subtitles in the few areas where people aren't speaking English. It convinced me, and although I haven't worked professionally in years, I do have a degree in geology.