Sentences with phrase «aragonite layers»

Not exact matches

The natural version, also called nacre, is found on the inner shell of some molluscs, where it is built up of layers of the mineral aragonite separated by organic polymers such as chitin.

A good example in nature is nacre, which is 95 percent inorganic aragonite and 5 percent crystalline polymer (chitin); its hierarchical nanoparticle ordering — a mixture of intercalated brittle platelets and thin layers of elastic biopolymers — strongly improves its mechanical properties.

The oyster or mussel slowly secretes layers of aragonite and conchiolin, materials that also make up its shell.

Accordingly, upwelling of waters acidified by anthropogenic CO2 has led to a further decrease in surface pH, as reported in the eastern Pacific Ocean along the west coast of North America, from central Canada to northern Mexico, where shoaling of the layer of seawater undersaturated with aragonite increased the frequency and magnitude of coastal acidification associated with upwelling events (Feely et al. 2008, 2010).

The record captures nearly every season in that time period, Goldstein said, with white layers of a mineral called aragonite marking summer evaporations, when the minerals were left behind as water vanished.