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Latest Sedimentology Stories

2010-03-02 17:59:00

ALBUQUERQUE, N.M., March 2 /PRNewswire/ -- Jennifer Hise, a 3rd generation owner of CEMCO, is serving her first term on the NSSGA M&S Division Executive Committee. Executive Committee members serve for 1 year terms for up to three terms. Jennifer's goal is to be the first woman Chairman of the M&S Division, following in her father Neil Hise's footsteps, who was also an executive committee member prior to becoming Chairman in 2005. "It is an honor to be a member of this committee...

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2010-01-19 11:56:19

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. The Kimmeridge Clay Formation...

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2010-01-11 09:20:00

The new species is the largest of its type in the Middle East, but its habitat is endangered A new and previously unknown species of spider has been discovered in the dune of the Sands of Samar in the southern Arava region by a team of scientists from the Department of Biology in the University of Haifa-Oranim. Unfortunately, however, its habitat is endangered. "The discovery of this new spider illustrates our obligation to preserve the dune," says Dr. Shanas, who headed the team of...

2009-12-10 13:46:13

Environmental scientists at the University of Pennsylvania and Durham University have employed a novel combination of geological and model reconstructions of wetland environments during a 10,000-year period to address spatial variations in sea-level history and provide quantitative estimates of subsidence along the east coast of England. The findings indicate that glacial rebound "” the rise or fall of land masses that were depressed by the huge weight of ice sheets during the last...

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2009-11-20 10:59:16

The Dutch beach in Monster is currently inhabited by bulldozers that are piling sand taken from the bottom of the North Sea into dunes in a determined attempt to protect the Netherlands from flooding. The ambitious project, located 15 miles south of The Hague, is one of several plans in a continued fight against increasing sea levels accredited to global warming. "Because it is a low-lying delta, the Netherlands is very sensitive to climate change," Water Management Deputy Minister Tineke...

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2009-10-23 14:22:44

While most people head to Myrtle Beach for vacation, a group of scientists have been hitting the famous South Carolina beach for years to figure out how to keep the sand from washing away. Although they studied only a limited segment of beach, their work is a model for beach preservation that can apply elsewhere. And with talk of "balancing the sand budget" and money saved on restoration, their findings sound financial. The study will be presented to scientists from around the world at the...

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2009-10-20 15:16:24

Openings in Mississippi levees could build new land in sinking delta Diverting sediment-rich water from the Mississippi River below New Orleans could generate new land in the river's delta in the next century. The land would equal almost half the acreage otherwise expected to disappear during that period, a new study shows. For decades, sea-level rise, land subsidence, and a decrease in river sediment have caused vast swaths of the Mississippi Delta to vanish into the sea. The anticipated...

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2009-10-07 08:16:26

The windswept deserts of northern China might seem an odd destination for studying the heavy monsoon rains that routinely drench the more tropical regions of Southeast Asia. But the sandy dunefields that mark the desert margin between greener pastures to the south and the Gobi Desert to the north are a rich source of information about past climates in Asia, says University of Wisconsin-Madison geographer Joseph Mason. Wetter periods allow vegetation to take root on and stabilize sand dunes....

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2009-09-30 09:54:10

Vegetation and sand found to be essential in stream life In a feat of reverse-engineering, Christian Braudrick of University of California at Berkeley and three coauthors have successfully built and maintained a scale model of a living meandering gravel-bed river in the lab. Their findings point to the importance of vegetation to reinforce the banks and, surprisingly, to the importance of sand in healthy meandering river life. The significance of vegetation for slowing erosion and reinforcing...

2009-09-21 13:06:41

A U.S.-led international scientific team says it has determined that Earth's river deltas are sinking due to human activity, many having recent severe flooding. The researchers, led by University of Colorado-Boulder Professor James Syvitski, found 24 of the world's 33 major deltas are sinking, making them increasingly vulnerable to flooding from rivers and ocean storms and putting tens of millions of people at risk. The study concludes the sinking of deltas from Asia and India to the Americas...


Latest Sedimentology Reference Libraries

River Delta
2013-04-18 22:36:25

A river delta is a landform that is created at the mouth of a river, where the river flows into an ocean, estuary, lake, sea, or reservoir. These deltas are built from the deposition of the sediment that is carried by the river as the flow exit’s the mouth of the river. Over a long period of time, this deposition constructs the distinctive geographic pattern of a river delta. The creation of a delta is made up of three core forms: the bottomset, topset, and foreset/frontset. Bottomset...

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2005-05-26 11:13:08

In geology, a conglomerate is a rock consisting of other stones that have been cemented together. Conglomerates are sedimentary rocks consisting of subangular clasts and are thus differentiated from breccias, which consist of angular clasts. Both conglomerates and breccias are characterized by clasts larger than sand (>2 mm). There are two varieties of conglomerate, defined by texture: paraconglomerates and orthoconglomerates. Paraconglomerates are one of two varieties of conglomerate...

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