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All Articles Tagged As: sediments
Research has revealed that fine carbonate sediment found in the ocean is produced in the intestines of fish. This explains the origins of this sediment for the first time.
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 | At the end of the last interglacial epoch, around 115,000 years ago, there were significant climate fluctuations. In Central and Eastern Europe, the slow transition from the Eemian Interglacial to the Weichselian Glacial was marked by a growing instability in vegetation trends with possibly at least two warming events. This is the finding of German and Russian climate researchers who have evaluated geochemical and pollen analyses of lake sediments in Saxony-Anhalt, Brandenburg and Russia. ...> Full Article |
 | The sediments of the Kimmeridge Clay Formation were deposited during the Late Jurassic between around 160 and 145 million years ago, the age of the reptiles. They are the main oil source rock in the North Sea. However, within this unit beds rich in organic matter are interspersed with organic-poor sediments. New evidence demonstrates that organic-poor sediments were probably caused by post-depositional loss of organic matter during so-called "burn-down" events. ...> Full Article |
 | Researchers create first self-sustaining meander, proving role of bank strength, fine sediment ...> Full Article |
New research involving scientists from the National Oceanography Centre, Southampton, highlights the potential utility of iron isotopes for addressing important questions in ocean science. The findings are published in the August edition of the journal Geology.
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Biomass, metabolic activity much lower than at previously explored sites
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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. The record, trapped within the top 20 meters (65.6 feet) of a 400-meter (1,312-foot) sediment core drilled in 2005 in the North Atlantic Ocean by the Integrated Ocean Drilling Program, gives new information about the four glacial cycles that occurred during that period.
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 | Study off Santa Barbara is first to quantify oil in sediments ...> Full Article |
 | The Integrated Ocean Drilling Program drillship JOIDES Resolution is returning to port in Honolulu this week after a two-month voyage to chart detailed climate history in the equatorial Pacific Ocean. The expedition was the first of two back-to-back voyages of a scientific project called Pacific Equatorial Age Transect. It was the first international scientific drilling expedition after the JOIDES Resolution underwent a multiyear transformation into a 21st-century floating science laboratory. ...> Full Article |
 | The Geological Society of America presents a new Special Paper, Paleoenvironments of Bear Lake, Utah and Idaho, and Its Catchment. This volume is the culmination of more than a decade of coordinated investigations aimed at a holistic understanding of the long-lived Bear Lake, which is located 100 km northeast of Salt Lake City, along the course of the Bear River, the largest river in the Great Basin of the western United States. ...> Full Article |
After a complete transformation to modernize and upgrade the research vessel JOIDES Resolution (JR, for short), the ship has set sail from the Singapore shipyard where the work was done, for science sea trials and transit to Honolulu.
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The power of viruses is well documented in human history. Swarms of little viral Davids have repeatedly laid low the great Goliaths of human civilization, most famously in the devastating pandemics that swept the New World during European conquest and settlement.In recent years, there has been growing evidence to suggest that the effect of the pandemics in the Americas wasn't confined to killing indigenous peoples. Global climate appears to have been altered as well.
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Weakening of summer monsoons to blame
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 | Scientists have discovered the Intertropical Convergence Zone may not be the key to southeast Africa's climate after all ...> Full Article |
New study compares 13C/12C records from carbonate platforms in 3 ocean basins
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Better understanding of flood uncertainty is key to helping mitigate damage
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 | New findings could pour cold water on evidence that climate change is happening simultaneously around the world. ...> Full Article |
The oceans epic ebbs and flows of sea level and sediment over the course of geologic time, that is the primary cause of the world's periodic mass extinctions during the past 500 million years
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 | Geologist surprised to find thick layers of ancient lake sediment filled with plant, fish and animal fossils typical of far lower elevations and warmer, wetter climates. ...> Full Article |
 | Mountain building may occur in faster fits and spurts than previously realized ...> Full Article |
Research on sedimentary record of meteorite impacts on Earth
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 | Meteorite linked to mass extinction 65 million years ago was four to six kilometers in diameter ...> Full Article |
 | The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals, according to a new study. ...> Full Article |
Researchers studying cores of sediment collected 40 years ago have found evidence for magnetic field vortices in the Earth's core beneath the South Pole. The results contrast with earlier studies at lower latitudes, and could lead to a better understanding of processes in the core.
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 | Not too long ago, a lake sprung a leak in the high country of the Wrangell-St. Elias Mountains. The lake drained away, as glacier-dammed lakes often do, but this lake was a bit different, and seems to be telling a story about a warmer Alaska. ...> Full Article |
In the science world, in the media, and recently, in our daily lives, the debate continues over how carbon in the atmosphere is affecting global climate change. Studying just how carbon cycles throughout the Earth is an enormous challenge, but one Northwestern University professor is doing his part by studying one important segment -- rivers.
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 | Geologists have long thought muds will only settle when waters are quiet, but new research shows muds will accumulate even when currents move swiftly. ...> Full Article |
 | Researchers have taken cores from the sediments of a Canadian Arctic lake and found an interglacial record indicating two ice-free periods that could pre-date the Holocene Epoch. ...> Full Article |
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