News tagged with ancient oceans
Scientists link ocean acidification to prehistoric mass extinction
(PhysOrg.com) -- New evidence gleaned by analyzing calcium embedded in Chinese limestone suggests that volcanoes, which spewed massive amounts of carbon dioxide into the atmosphere for a million years, caused the biggest ...
Space & Earth / Earth Sciences
Apr 27, 2010 |
4.5 / 5 (13) |
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Early Earth absorbed more sunlight -- no extreme greenhouse needed to keep water wet
Four billion years ago, our then stripling sun radiated only 70 to 75 percent as much energy as it does today. Other things on Earth being equal, with so little energy reaching the planet's surface, all water ...
Space & Earth / Earth Sciences
Apr 06, 2010 |
4.8 / 5 (12) |
5
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New picture of ancient ocean chemistry argues for chemically layered water
A research team led by biogeochemists at the University of California, Riverside has developed a detailed and dynamic three-dimensional model of Earth's early ocean chemistry that can significantly advance ...
Space & Earth / Earth Sciences
Feb 11, 2010 |
5 / 5 (3) |
0
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Carbonate veins reveal chemistry of ancient seawater
The chemical composition of our oceans is not constant but has varied significantly over geological time. In a study published this week in Science, researchers describe a novel method for reconstructing past o ...
Space & Earth / Earth Sciences
Feb 05, 2010 |
3.7 / 5 (3) |
0
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Study: Animals populated Madagascar by rafting there
How did the lemurs, flying foxes and narrow-striped mongooses get to the large, isolated island of Madagascar sometime after 65 million years ago?
Other Sciences / Archaeology & Fossils
Jan 20, 2010 |
4.5 / 5 (2) |
3
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Earth's early ocean cooled more than a billion years earlier than thought (w/ Video)
(PhysOrg.com) -- The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 ...
Space & Earth / Earth Sciences
Nov 11, 2009 |
4.3 / 5 (12) |
1
Snail fossils suggest semiarid eastern Canary Islands were wetter 50,000 years ago
Fossil land snail shells found in ancient soils on the subtropical eastern Canary Islands show that the Spanish archipelago off the northwest coast of Africa has become progressively drier over the past 50,000 years.
Space & Earth / Earth Sciences
Oct 27, 2009 |
2.5 / 5 (2) |
0
Ancient oceans offer new insight into the origins of animal life
(PhysOrg.com) -- Analysis of a rock type found only in the world's oldest oceans has shed new light on how large animals first got a foothold on the Earth.
Space & Earth / Earth Sciences
Sep 09, 2009 |
4.4 / 5 (10) |
1
Iron isotopes as a tool in oceanography
New research involving scientists from the National Oceanography Centre, Southampton (NOCS) highlights the potential utility of iron isotopes for addressing important questions in ocean science. The findings are published ...
Space & Earth / Earth Sciences
Jul 31, 2009 |
3.7 / 5 (3) |
1
Sediment yields climate record for past half-million years
Researchers here have used sediment from the deep ocean bottom to reconstruct a record of ancient climate that dates back more than the last half-million years.
Space & Earth / Earth Sciences
Jun 15, 2009 |
4.5 / 5 (10) |
1
Meteorite bombardment may have made Earth more habitable
(PhysOrg.com) -- Large bombardments of meteorites approximately four billion years ago could have helped to make the early Earth and Mars more habitable for life by modifying their atmospheres, suggests the ...
Space & Earth / Earth Sciences
Jun 01, 2009 |
4.3 / 5 (7) |
3
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