clay stone

American  

Or claystone

noun

Geology.

1. argillite.

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Etymology

Origin of clay stone

First recorded in 1770–80

Example Sentences

His most distinct physical feature was a dent on his forehead — a sign of his devotion to the Shia faith of Islam that came from pressing his forehead to the mohr, a clay stone used in daily prayers.

From New York Times

Visitors here were treated to garlands of their own, local tribal dances, coffee, tea and evening lightshows displayed on the village’s 500-year-old distinct natural clay, stone and wood structures.

From Washington Times

Carefully-constructed walls as well as clay, stone and marble floors were uncovered.

From BBC

Archaologists discovered clay, stone and marble floors and some of the walls were very carefully constructed, the ministry said.

From Reuters

In Logan County, teacher Leah Clay Stone says employees “did vote to not work one day.”

From Seattle Times