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ScienceDaily: Fossils & Ruins News |
| Fast-melting alpine permafrost may contribute to rising global temperatures Posted: 14 Mar 2022 03:14 PM PDT Using lake sediment in the Tibetan Plateau, a team of researchers was able to show that permafrost at high elevations is more vulnerable than arctic permafrost under projected future climate conditions. |
| Rapid changes to the Arctic seafloor noted as submerged permafrost thaws Posted: 14 Mar 2022 12:44 PM PDT A new study has documented how the thawing of permafrost submerged underwater at the edge of the Arctic Ocean is affecting the seafloor. |
| Large, long-lived, and entirely molten magma chambers once existed in Earth’s crust Posted: 14 Mar 2022 07:56 AM PDT Geologists have come up with multiple lines of evidence indicating that the Bushveld Complex in South Africa functioned as a 'big magma tank' in the ancient Earth's crust. |
| Ice sheet retreat and forest expansion turned ancient subtropical drylands into oases Posted: 14 Mar 2022 07:56 AM PDT Researchers focused on the climate of the Pliocene, over 3 million years ago, the last time Earth has seen concentrations of over 400 PPM CO2 in the atmosphere, similar to today's concentrations. The Pliocene prompts a long-standing question: despite the similarity to the present-day, why were dry areas like the Sahel in Africa and Northern China much wetter and greener in the Pliocene than they are today? |
| Microbes and minerals may have set off Earth’s oxygenation Posted: 14 Mar 2022 06:57 AM PDT Around 2.3 billion years ago, oxygen began building up in the atmosphere, eventually reaching the life-sustaining levels we breathe today. A new hypothesis suggests a mechanism for how this may have happened. |
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