Science news articles about 'sediment accumulation'

... of human activities, through dams, agriculture, and changes to soil use, is the main cause of sediment accumulation. The Catalan river basins have "a steep descent, easily eroded rocks, considerable ...

... Because the region is so far from terrestrial sources of sediment and so few organisms live in its water, its sediment accumulates extraordinarily slowly – as few as 8 centimeters per ...

... geologic indicators, including the history of folding and faulting, erosion, volcanic eruptions, and sediment accumulation suggest a hotly debated tectonic process called delamination likely at work, ...

... and monitoring programs had been put in place. By studying tiny fossils and other indicators in sediment accumulated at the bottom of each lake, Queen's paleoecologist professor John Smol, Canada ...

... needed to maintain the depth. "The sediment accumulation didn't happen. In fact, at our research site, ... rising tide water, causing suspended sediment to settle, resulting in layers of land over time. ...

... sand, exposure of hardpans at the surface, and gravel lag. Nebkha dunes, formed from sediment accumulations around shrubs, have been considered a reliable indicator of rapid dryland degradation. As a ...

... compare that record to modern temperature records," says Oppo. "That's what is different about this study. The sediment accumulates fast enough in this region to give us enough material to sample and ...