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Latest Sedimentology Stories

2010-11-23 12:56:24

Southampton scientists along with colleagues in New Zealand have used a sophisticated optical mapping technique to identify and accurately measure changes in coastal morphology following a catastrophic series of landslides. "Our findings are important for assessing geological hazards and reducing the dangers to human settlements," said geophysicist Professor Jon Bull of the University of Southampton's School of Ocean and Earth Science based at the National Oceanography Centre, Southampton,...

2010-09-28 20:12:21

Understanding Missouri River's Sediment dynamics key to protecting endangered species, setting water quality standards, says new report A new report from the National Research Council says that more organized and systematic procedures for gathering and evaluating data on Missouri River sediment are required to improve decisions and better manage the river's ecosystem, including protecting endangered species and developing water quality standards. In addition, the report finds that the U.S....

2010-08-09 15:52:00

NOVATO, Calif., Aug. 9 /PRNewswire/ -- Today, as the California Senate considers major new recommendations to increase freshwater flows to the San Francisco Bay-Delta estuary, the Bay Institute released Gone with the Flow, a primer on how flows support a healthy ecosystem, and how the lack of flow is degrading that ecosystem to the point of collapse. The primer is available for free at http://www.bay.org/assets/Gone%20with%20the%20Flow%20WEB%20FINAL.pdf. "Flow is the most important driver...

2010-07-21 14:47:00

NOVATO, Calif., July 21 /PRNewswire/ -- Today, the State Water Resources Control Board released its long awaited draft report, identifying new flow criteria for the endangered Delta ecosystem. The report recognizes that the Delta ecosystem is getting far less water than is needed to protect public trust resources, and recommends new flow criteria that would significantly improve conditions in the estuary, based in large part on analyses and recommendations developed by The Bay Institute....

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2010-07-06 10:30:16

The method predicted 2008 dust storm at New Mexico's White Sands Dune Field using temperature images from NASA's Earth-orbiting ASTER instrument, team reports in the Journal of Geophysical Research Earth Surface Researchers based at the University of Pittsburgh have developed a method for predicting dust and sandstorms that uses infrared satellite images to determine when conditions are ripe for the destructive phenomena, a technique that could be implemented globally and that the research...

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2010-06-17 13:35:16

Scientists tracking wetland characteristics find potential good news The Gulf of Mexico: what role will the Mississippi River play in oil washing ashore and into delta wetlands? One of the spill's greatest environmental threats is to Louisiana's wetlands, scientists believe. But there may be good news ahead. Scientists affiliated with the National Center for Earth-surface Dynamics (NCED), a National Science Foundation (NSF) Science and Technology Center headquartered at the University of...

2010-04-29 07:00:00

HOUSTON, April 29 /PRNewswire-FirstCall/ -- Sale of South Florence Field, Vermilion Parish, Louisiana Dune Energy (NYSE Amex: DNE) announced it has reached an agreement in principle to sell its interests in the South Florence field for $30 million to a private party. As of December 31, 2009, Dune's interest in this field corresponded to 11.9 Bcfe of proved reserves based on an independent reserve report. Production from the field has averaged approximately 3.8 Mmcfe/day during the...

2010-04-14 05:18:00

CARRABELLE, Fla., April 14 /PRNewswire/ -- For three hours, firefighters from the Carrabelle, Lanark and Apalachicola, Florida, filled sand bags to build a forty-five foot long storm surge wall. The training exercise was conducted using newly developed bright blue and yellow high tech sand bags. The new wedge-shaped, wide mouth sand bags were a hit with the fire crews. The wall went up in half the time and nobody got their fingers cut and bruised trying to fill narrow mouth conventional...

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2010-04-05 11:05:00

Surplus food can be a double-edged sword for bottom-feeders in the ocean deep, according to a new study in the April issue of Ecology. While extra nutrients give a boost to large animals on the deep sea floor, the feeding frenzy that results wreaks havoc on smaller animals in the seafloor sediment, researchers say. Descend thousands of feet under the ocean to the deep sea floor, and you'll find a blue-black world of cold and darkness, blanketed in muddy ooze. In this world without sunlight,...

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2010-03-16 14:44:01

An interdisciplinary team of physicists and geologists led by the University of Pennsylvania has made a major step toward predicting where and how large floods occur on river deltas and alluvial fans. In a laboratory, researchers created a miniature river delta that replicates flooding patterns seen in natural rivers, resulting in a mathematical model capable of aiding in the prediction of the next catastrophic flood. The results appear in the current issue of Geophysical Research Letters....


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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