A secondary clay useful for blending in stoneware bodies.

Earthenware is a secondary clay and is normally red but also comes in the colour of buff, sand, and white.

Earthenware clays are also secondary clays, and are many and various.

A secondary clay moved from the parent rock, ball clay is often mixed with other clays and minerals, organic matter are frequently present.

Secondary clays are clays that have been transported from their original location by water erosion and deposited in a new sedimentary deposit.

Westerwald Stoneware made from secondary clay associated with Coal Measures (fireclay) Why did they adapt the clay?

The Thorium versus Potassium cross-plot confirms illite as being the main clay and kaolinite as the secondary clay mineral.

Secondary clay has been moved by geological forces, by glacial action, by rock folding, by water, or by wind so the clay is finer in particle size.

X-ray diffraction confirms illite as the main clay mineral, kaolinite as the secondary clay, and, as a special mineral, haematite/siderite.

By-products of this weathering are poorly ordered iron oxides and amorphous alumino-silica gels, the neoformation of crystalline metal oxalates and secondary clay minerals.