Argillite

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

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Notion

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Science and technology

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What Wikipedia says

Argillite ( ) is a fine-grained sedimentary rock composed predominantly of indurated clay particles. Argillaceous rocks are basically lithified muds and oozes. They contain variable amounts of silt-sized particles. The argillites grade into shale when the fissile layering typical of shale is developed.

Excerpt from the Wikipedia article “Argillite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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