Coal, for instance, usually contains a few percent clay minerals.

In some of these clay minerals, increased dioxin values were actually found.

They are a major component of kaolin and other clay minerals.

Mixed layer clay minerals which are perfect R1 types often get their own names.

The intercalation in clay minerals was major research interest during the start of his academic career.

Clay minerals trap and preserve organic compounds under some conditions.

Some grains show signs of secondary alteration to clay minerals.

The rest is 14% clay minerals and there is also the carbon element.

Related tests found results consistent with the presence of smectite clay minerals.

Clay minerals continue to be formed as long as the soil exists.

Clay minerals need water to form, so the area may once have contained large amounts of water.

Despite being called "clay", it generally contains no clay minerals.

It also includes an area where clay minerals have been detected from orbiter observations.

An increase in hydrogen concentration in clay minerals has a similar effect on the count rate.

The remainder typically consists almost entirely of clay minerals.

W6: heavy replacement of silicates by clay minerals and oxides.

The breakdown results from the expansion which occurs when the clay minerals swell on absorption of water.

In addition to the weathering process, some clay minerals are formed by hydrothermal activity.

Alumina is negligible and there are no clay minerals.

The carbonates were found near the clay minerals.

Soils which are rich in clay minerals tend to have lower decomposition rates, and thus, higher levels of organic matter.

It can be confused with chlorite (also of green color) or with some other clay minerals.

Essentially, slate forms when the clay minerals in shale are out under increased pressure with high temperatures.

Chemical weathering is of the greatest importance in producing fine material, as clay minerals are formed by this process.

Olivine weathers rapidly into clay minerals in the presence of liquid water.