Sedimentation is the physical process by which particulate matter suspended in a fluid medium settles under the influence of gravity or centrifugal forces, leading to spatial segregation based on particle size, density, and shape. In research contexts it underpins techniques such as analytical and preparative centrifugation, sedimentation velocity and equilibrium methods, and sedimentation-based separation in environmental and geological studies. Sedimentation dynamics are described by Stokes’ law in the laminar regime, with deviations at higher Reynolds numbers. It critically influences transport and fate of contaminants, biogeochemical cycling of particulates, formation of stratified deposits, and clarification processes in engineered systems such as water and wastewater treatment.
Curiosity spent the week continuing to climb her way through the layers of Mount Sharp, exploring the sedimentary rock strip chart of Martian history. The rover has reached a layer where the science team had spotted a possible ...
Planetary Sciences
Jul 31, 2026
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Many people are familiar with fossilized wood as a decorative item from a museum shop. However, the fact that it can preserve the geological history of entire regions spanning millions of years is a new discovery. A research ...
Earth Sciences
Jul 24, 2026
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178
The sand used to build cities, roads and other infrastructure is being removed from many rivers faster than nature can replace it, according to a global review led by researchers from Nanyang Technological University, Singapore ...
Environment
Jul 21, 2026
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Traces or perforations caused by living organisms after an animal's death can be found on various dinosaur bone remains. These perforations, known as bioerosion structures, provide information that helps us understand relationships ...
Ecology
Jun 26, 2026
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292
Reservoirs around the world are losing storage capacity at an average rate of 7.3% per decade—disproportionately affecting small reservoirs, which together provide water to billions of people. The data come from a study published ...
Environment
Jun 5, 2026
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64
Can "snow" fall in the ocean and influence the climate of the entire planet? It turns out that it can. Research conducted by scientists from the Faculty of Physics at University of Warsaw, published in the Journal of Fluid ...
Earth Sciences
May 14, 2026
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23
Geologists have solved the mystery of the disappearance from the geological record, millions of years ago, of one of North America's most important waterways: the Colorado River. A paper published in Science shows that the ...
Earth Sciences
Apr 17, 2026
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1268
The analysis of a sediment core from an oasis lake in Chad provides new insights into the history of precipitation in the Sahara. The study, led by the University of Cologne, shows that a prolonged wet phase, which lasted ...
Earth Sciences
Mar 26, 2026
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22
A new study using multidecade satellite imagery and face-to-face human interviews tracked the environmental and societal impacts of gravel mining in the Lubha River, Northeast Bangladesh. The researchers found that the river ...
Environment
Mar 12, 2026
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10
In some parts of the deep ocean, it can look like it's snowing. This "marine snow" is the dust and detritus that organisms slough off as they die and decompose. Marine snow can fall several kilometers to the deepest parts ...
Earth Sciences
Mar 9, 2026
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