The nature of clays formed by such a large meandering river system are distinctive.

On the sides of the mountain are bands of palagonite, a clay formed from iron-rich tephra making up the body of the volcano.

The vineyards lay over a "raña" (local name for the hillsides at the foot of the Montes) composed of accumulated clay and quartzite pebble, formed from the mountain summit's erosion during the Tertiary era.

The soil is clay, formed by erosion, contrasted to sand islands formed by deposition.

The track was hard-baked clay, formed in a great oval that skirted the training ground.

Also known as potash bentonite or K-bentonite, potassium bentonite is a potassium-rich illitic clay formed from alteration of volcanic ash.

Fossil remains of marine life have been found in marine clay formed during that time.

The structure of Shiva is said to be made of white clay, formed as "Suyambu" - which, according to tradition, was not sculpted by man but formed spontaneously.

While some of the clay in a soil may have been inherited in the parent material, older soils might contain a significant amount of clay formed by weathering processes during soil formation.

The upper surface of the platform is marked by a circle of burnt clay formed by the burning of incense.