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Cryogenian Period

All articles tagged with #cryogenian period

science1 year ago•4 min saved

New Evidence Confirms 'Snowball Earth' Covered Entire Globe in Ice

Researchers have discovered glacial deposits in Colorado's Front Range, suggesting that during the Sturtian glaciation, around 660 to 700 million years ago, the region was covered by a massive ice sheet. These deposits, known as the Tavakaiv sandstones, contain hematite formed under specific conditions, indicating geothermal activity beneath the ice. This finding provides insight into the snowball Earth period, where even equatorial regions were glaciated, although conditions varied across different continents.

via Ars Technica|

#cryogenian-period #geology #glaciation

science1 year ago•5 min saved

Colorado Rocks Confirm 'Snowball Earth' Ice Age Theory

Geologists have discovered evidence in Colorado's Pikes Peak that supports the Snowball Earth hypothesis, which posits that Earth was once entirely covered in ice around 700 million years ago. The discovery involves pebbly sandstone, known as Tava injectites, formed by immense pressure from ice sheets during the Cryogenian Period. This finding provides crucial physical evidence of ice sheets covering equatorial regions, further cementing the Snowball Earth theory and offering insights into ancient climate conditions and geological processes.

via Livescience.com|

#climate-change #cryogenian-period #geology

science1 year ago•5 min saved

Discovery Unveils Key Evidence for Snowball Earth Theory

Researchers have discovered physical evidence supporting the Snowball Earth hypothesis, which suggests that Earth was once entirely covered in ice during the Cryogenian Period, around 700 million years ago. This evidence comes from pebbly sandstone formations found in Colorado's Pikes Peak, which were formed by sand injectites under immense pressure from ice sheets. The findings help date these formations to between 690 and 660 million years ago, providing new insights into Earth's climatic history and the processes that allowed life to survive and evolve during this global freeze.

via ScienceAlert|

#climate-change #cryogenian-period #geology

science1 year ago•4 min saved

Unusual Pikes Peak Rocks Reveal Snowball Earth Clues

Geologists have discovered evidence of the Snowball Earth period in unusual sandstone formations on Colorado's Pikes Peak, providing a missing link in understanding how ice sheets covered equatorial regions 700 million years ago. Using advanced radiometric dating, researchers determined these formations, known as Tava injectites, formed between 690 and 660 million years ago during the Cryogenian Period. This discovery not only supports the Snowball Earth hypothesis but also offers insights into geological phenomena like unconformities, challenging previous theories about their formation.

via The Conversation|

#climate-change #cryogenian-period #geology

science1 year ago•4 min saved

Ancient Rocks on Pikes Peak Reveal 'Snowball Earth' Clues

Geologists have discovered evidence of the Snowball Earth period in pebbly sandstone within Colorado's Pikes Peak granite, providing a missing link in understanding this global ice age. The Tava sandstone, formed between 690 and 660 million years ago, suggests that immense pressure from ice sheets forced sediment into weakened rock, supporting the Snowball Earth hypothesis. This discovery also challenges previous theories about the formation of the Great Unconformity, offering new insights into Earth's ancient climate and geological history.

via The Conversation|

#climate-change #cryogenian-period #geology