Sentences with phrase «carbonate sediments»
"Carbonate sediments" refers to deposits or layers of sediment that are made up primarily of minerals containing carbon, such as limestone or calcium carbonate. These sediments are formed from the remains of marine organisms like corals and shells, which accumulate over time and eventually solidify into rock-like formations. Full definition
This means that volcanic emissions of CO2 have been outweighed by the loss of carbon to calcium carbonate sediments on a multi-million year basis.
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Eventually, over hundreds of millennia, weathering of rocks will deposit all of this initial CO2 pulse on the ocean floor as carbonate sediments [168].
Eventually, over hundreds of millennia, weathering of rocks will deposit all of this initial CO2 pulse on the ocean floor as carbonate sediments [168].
Oxygen isotope ratios in carbonate sediments are correlated with the ratio of precipitation to evaporation and thus indicate aridity.
There are characteristic traces of iron and manganese in recent carbonate sediment on the banks, pointing to their Saharan origin.
In 1989 he and his colleagues Ian Wright and Monica Grady reported finding carbonate sediments and organic matter in another Martian meteorite called EETA 79001.
Carbonate rich areas, such as raised reefs and limestone islands, extensive reef flats, patch reef / coral head complexes, and carbonate sediment deposits
This is an area of silica based sand and mud deposition (called clastics or siliciclastics by geologists) with minor carbonate sediment.
At a recent meeting of the Geological Society of London that was devoted to thinking about the Anthropocene and its geological record, Toby Tyrrell of the University of Southampton pointed out that pale carbonate sediments — limestones, chalks and the like — can not be laid down below what is called a «carbonate compensation depth».
The action of plate tectonics, the motion of the Earth's surface, can subduct carbonate sediments; that is, as chunks of the Earth's crust gets pushed together, some of the rocks gets pushed deeper into the interior, where it is subjected to heat and pressure.
On still longer time scales, acidification by the invading CO2 dissolves carbonate sediments on the sea floor, which further enhances ocean uptake.
Carbonate sediments lofted by Tropical Cyclone Pam in the South Pacific were spotted by NASA's Terra satellite on March 16 at 23:05 UTC (7:05 p.m. EDT).
Where these seas occupied a tropical to subtropical climatic zone, coral mound reefs with associated carbonate sediments were very common.
Dissolution of carbonate sediment and reef by the lower - pH ocean that results from more CO2 can mitigate this by shifting the...
A further reduction by carbonate sediment dissolution, and reactions with igneous rocks, such as silicate weathering and sediment burial, will take anything from tens to hundreds of thousands of years, or even longer.
The Earth has roughly the same amount of CO2 as does Venus, but it is nearly all locked up in the crust as carbonate sediments.
An infrared spectrometer built by Jean - Pierre Bibring of the Institute of Space Astrophysics in Orsay, France, will make a mineralogical map of the planet's surface, looking in part for the carbonate sediments that should have been deposited in Martian lakes or oceans.
CO2 not sole determinant of ocean pH. The pH of the ocean depends not only on atmospheric CO2 content, but also how much time that CO2 has had to spread through the ocean and interact with carbonate sediments, and how much carbonate and silicate rock weathering has occured on land.
Over longer time scales, very slow secondary geological processes — dissolution of carbonate sediments and sediment burial into the Earth's crust — become important.