Sentences with phrase «calcite when»

They suspect that vaterite may be present on more plant species, but that the unstable mineral is being converted to calcite when exposed to wind and rain.

To see what happens to the calcite when it is destabilized, researchers used a technique called X-ray reflection interface microscopy (XRIM) at the APS.

Not exact matches

Pure calcite crystals shatter easily, but the oyster shell is organised in thin layers that shift orientation when stressed, confining damage to shallow craters and stopping fractures spreading (Nature Materials, DOI: 10.1038 / nmat3920).

In this case, the microscope not only identified signatures corresponding to calcium carbonate as forming the crust, but was also able to differentiate between the calcite and vaterite forms when it was present as a mixture while still attached to the leaf surface.»

The team also showed that calcite associated with two seismic events in the earthquake cluster indicates very rapid carbon dioxide degassing, which can occur when fluid under high pressure is released — like opening the top of a shaken bottle of soda.

The bacteria enhanced the formation of calcite even when they were just lying around, not growing or multiplying.

He and the rest of the research team, which includes Warren Sharp from the Berkeley Geochronology Center and Peter Mozley of the New Mexico Institute of Mining and Technology, could measure the age of each «generation» of calcite found in the veins and determine when earthquakes occurred relative to one another.

When the researchers dunked mineral samples in solutions containing both left - and right - handed versions of the amino acid aspartic acid, they discovered that the different versions preferentially stuck to different facets of the calcite crystals.

Calcite crystals that glitter when

Foraminiferal or molluscan calcite dO18 can thus change with no change in SST, leading to mistaken derivations of T when a standard method is applied across the climatological boundary.

Finds that for calcite, undersaturation occurs when carbonate ion concentration drops below 42 µmol kg - 1

The calcite corals first achieved algal symbiosis and came into being 550 million years ago (you are too young to remember) during the Cambrian era, when atmospheric CO2 concentration was 25 times what it is today.

We can also agree that when constructing paleo - temperatures from fossil calcite, direct knowledge of paleo - marine temperature and salinity is not in hand.