Sentences with phrase «calcium carbonate deposits»

As time goes on calcium carbonate deposits on the plaque, hardens, and then becomes calculus.

Calcium carbonate deposits also contain a record of Earth's history.

The paleoclimate data, which included mainly changes in the oxygen isotopes of the calcium carbonate deposits, were then compared to similar records from other caves, ice cores, and sediment records as well as model predictions for water availability in the Middle East and west central Asia today and into the future.

If they made any paintings on the cave walls 100,000 years ago, calcium carbonate deposits would have obscured them, so the team plans to beam X-rays through the layers to see if our ancestors left traces of loftier artistic ambitions.

With the symbionts gone, the hard, white structure below — calcium carbonate deposited by the polyps — shows through.

Because more CO2 in the atmosphere makes the oceans more acidic, the event can be tracked by looking at the amount of calcium carbonate deposited on the ocean floor by marine organisms.

Not exact matches

Coral reefs are typically massive biogenic formations of calcium carbonate (limestone) that is deposited within or around the bodies of the inhabitants of the reef as skeletal material.

Ocean deposits of calcium carbonate, or limestone, indicate that CO2 - rich rainwater stripped calcium and strontium from the Himalayan rock; these elements fused with the carbon dioxide and spilled into the sea, effectively pulling carbon from the atmosphere.

In addition, he notes, evaluating the fine structure of calcium carbonate mineralization deposited in hydrothermal systems during different periods of Earth's evolution may offer insights into which microbes lived at which times.

It is deposited from the water of mineral springs (especially hot springs) or streams saturated with calcium carbonate.

The concentrations were lowest in the eastern and far western states where the soil had been tilled the longest, and were highest in Deaf Smith County, Texas, where excavations proved the roots of the wheat grass to pass down six feet or more through three feet of top soil into deposits of glacial pebbles cemented together with calcium carbonate.

Growth is in an upward and outward direction with individuals slowly building the walls of their living chambers higher and depositing more floor underneath them, leaving the interior of the coral a lifeless mass of calcium carbonate.

One of the major rock types deposited in this sea was limestone, a rock formed of calcium carbonate.

Limestone, a rock formed of calcium carbonate was one of the major rock types deposited in the sea.

The answer is the calcium carbonate in the form of calcite found in coral, limestone, marble, and other mineral deposits.

Those chalk deposits were the result of sinking plankton that produced calcium carbonate shells like foraminifera and coccolithophorids, As discussed in Natural Cycles of Ocean Acidification, the creation of calcium carbonate shells pumps alkalinity to depth but produces CO2 at the surface thus adding to higher concentrations of atmospheric CO2.

The dynamics in coastal waters is somewhat different given the presence of immense sources of deposited calcium carbonate.

Scientists measure the carbon levels deposited by dying sea creatures, but the greenhouse effect also makes the oceans more acidic meaning that the calcium carbonate left by sea creatures is dissolved.

Bearing mind that during the Cretaceous when vast amounts of calcium carbonate was deposited in the oceans and CO2 concentrations in the atmosphere were in the high 100s / 1000s ppm, i have serious doubts about the data and the risk of any problems.

-- Huge thicknesses of oceanic limestone (calcium carbonate CaCO3) deposits formed from the conversion of CO2 to bicarbonate and then CaCO3 assisted by the biosphere.

All creatures which deposit calcium carbonate - not only corals, but crabs, sea urchins, and many others — are affected by the acidity of the water around them.