A claystone is a mudrock which does not split easily.

The deposit in which the bones were found was a silty claystone.

Claystone - greater than half of the composition is clay-sized particles.

Claystone invariably forms the roof and the floor rock of the coal beds.

These strata are made up mainly of sandstone, claystone and conglomerates.

The basin is composed of gravel, claystone, sandstone and siltstone.

Chugwater is located in a valley with steep claystone bluffs to the north and west.

Other rock types include claystone, conglomerate, dolomite, and oil shale.

Origin of the Claystone porphyry formation, page 170.

It consists of sedimentary rocks such as sandstone, siltstone and claystone.

The claystone apparently formed from sediment of a small floodplain, such as an ephemeral pool.

The roof and the floor rocks are claystone and loose sandstone beds.

Silicified carbonates and opalized claystone have also been found.

Other rocks in the area include sandstone and claystone, and sand and gravel.

The sandstones are occasionally intercalated with very thin-bedded blue-grey claystone.

The material consisted of loose black ash and claystone fragments with some sandstone and wood.

Claystone and Sandy Beach Parks have large beaches with children's playgrounds.

Claystone and shales are thus predominantly argillaceous.

The latter is between 400 and 600m thick and includes some siltstone and claystone beds.

It was filled with sand, and the resulting sandstone stands out against the surrounding mudstone and claystone.

The varying types of mudrocks include: siltstone, claystone, mudstone, slate, and shale.

It occurs from Grafton to Casino consisting of soft sandstone, siltstone and claystone.

There are two oil shale types in Estonia-Dictyonema argillite (claystone) and kukersite.

A claystone is lithified, and non-fissile mudrock.

The specimen is preserved in a hard claystone nodule, which preserved the leaflets in relief.