Active margins, where an oceanic plate slides under a continental plate, may cause earthquakes and tsunamis. Further, they are known for shifting sediments from margin slopes into deep ocean trenches. Geologists now found ...
Earth Sciences
15 hours ago
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The findings of a research expedition to coastal Greenland which examined, for the first time, how melting ice is affecting supplies of nutrients to the oceans has been published in the journal Progress in Oceanography.
Earth Sciences
Jun 25, 2019
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In nutrient-poor deep-sea sediments, microbes belonging to Archaea have outcompeted bacterial microorganisms for millions of years. Efficiently scavenging dead cells makes them the basal producers in the food chain.
Evolution
Jun 20, 2019
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The roles of "climate change" versus "tectonics" that dominate erosion and sediment transport over geological time scales have long been a hot topic in Earth science. How to effectively separate their respective roles is ...
Earth Sciences
Jun 18, 2019
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New findings of a multi-university research team show the pesticide DDT persists in remote lakes at concerning levels half a century after it was banned, affecting key aquatic species and potentially entire lake food webs.
Environment
Jun 12, 2019
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Studying the sediment of a mountain river can reveal thousands of years or more of a waterway's history, including new threats from more frequent wildfires and increased precipitation brought by climate change.
Environment
Jun 11, 2019
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The sea water, beaches and sediments on the Tarragona coast contain quantities of plastic similar to those in a big city like Barcelona. And more than half are clothing fibres from washing machines. This is one of the main ...
Environment
Jun 10, 2019
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Sediment stirred up from fishing activity has a detrimental effect on reef-building sea sponges in northern British Columbia, according to a new study by University of Alberta biologists.
Ecology
Jun 06, 2019
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16
Earth's outer layer is composed of giant plates that grind together, sliding past or dipping beneath one another, giving rise to earthquakes and volcanoes. These plates also separate at undersea mountain ridges, where molten ...
Earth Sciences
Jun 05, 2019
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283
Every beachgoer can spot seaweed in the ocean or piling up on the beach, but Florida State University researchers working with colleagues in the United Kingdom have found that these slimy macroalgae play an important role ...
Environment
Jun 03, 2019
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Sediment is any particulate matter that can be transported by fluid flow, and which eventually is deposited.
Sediments are most often transported by water (fluvial processes) transported by wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice transported sediments.
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