Mudstone facts for kids

Kids Encyclopedia Facts
Rocks in the sea - geograph.org.uk - 219304
These are some of the oldest rocks in the Dingle Peninsula, being Silurian in date. They consist of mudstones and siltstones with some volcanic material (County Kerry)

A mudstone is a siliciclastic sedimentary rock which has a mixture of silt- and clay-sized particles (at least 1/3 of each). So, a mudstone is a type of mudrock with a more varied grain size than either siltstones or claystones.

Alternatively, some sources say it is a synonym for mudrock.

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Mudstone Facts for Kids. Kiddle Encyclopedia.