Sentences with phrase «sediment deposition in»

Certainly, this leads to erosion in some areas, but it also increases sediment deposition in others.

We estimated that sediment deposition in a small body of water that stays frozen for most of the year would probably not exceed a few centimeters a year, so such a thick sediment layer might imply that the lake existed before 1908.

Not exact matches

This newest threat follows on the heels of overfishing, sediment deposition, nitrate pollution in some areas, coral bleaching caused by global warming, and increasing ocean acidity caused by carbon emissions.

They found that high rates of carbon accumulation in lake sediments were stimulated by several factors, including «thermokarst erosion and deposition of terrestrial organic matter, -LSB-...] nutrient release from thawing permafrost that stimulated lake productivity, and by slow decomposition in cold, anoxic lake bottoms.»

This is one of the main arguments of proponents of the «hydrothermal hypothesis», according to which gold, chemically dissolved in hot fluid, passed into the sediment layers half a billion years after their deposition.

But new computer models hint that the U-turn resulted from more familiar geological processes taking place at Earth's surface — in particular, the persistent erosion, movement, and deposition of sediment wearing away from the growing Andes.

«Some of the observed features included ancient river beds, craters, massive extinct volcanoes, canyons, layered polar deposits, evidence of wind - driven deposition and erosion of sediments, weather fronts, ice clouds, localized dust storms, morning fogs and more,» NASA wrote in a summary of the mission.

Instead, the results from a carbonate deposition model argue that the saturation state of the SCS was largely invariant; a separate diagenetic model argues that changes in sediment CaCO3 content can be explained by alterations in lithogenic input.

My earliest research was on orbital - scale changes in North Atlantic sediments to reconstruct past sea - surface temperatures and to quantify the deposition of ice - rafted debris.

However, studies of sediment cores have shown that natural dust deposition has been in decline.

1) tectonics — earthquakes and slow seismic events 2) erosion / sedimentation 3) isostatic rebound — response to a change in surface load (such as the removal of an ice sheet or deposition or removal of sediment)

Forests also enhanced silicate mineral weathering, further removing CO2 from the atmosphere via the deposition of carbonates in deep ocean sediments [Berner, 2003].

4) because the deposition process is so delicate in both seasons, anything that interrupts the water / sediment flows or equilibrium in any one year will result in a deformation of the annual «pair».

In the Arctic, the record of atmospheric deposition of Hg2 + species in lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see reIn the Arctic, the record of atmospheric deposition of Hg2 + species in lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see rein lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see rein mercury deposition which parallels increasing industrialization (see ref.

In both the United States and Europe, however, most sediment and peat record reconstructions show higher deposition of atmospheric divalent mercury during the 1970s (10, 11, 14), simultaneous with the peak in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49In both the United States and Europe, however, most sediment and peat record reconstructions show higher deposition of atmospheric divalent mercury during the 1970s (10, 11, 14), simultaneous with the peak in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49).

I wonder if the rate of sediment deposition will actually increase as glacial melting increases in the Himalayas, before slowing again as the major rivers of South Asia become fed more by rain alone than by seasonal glacial melting.