Claystone – A detailed guide
Claystone is a cousin of siltstone and mudstone in particle size. Thereby, the formation of claystone is akin and useful like mudstone in the industry. World of Stones USA is giving fine clues of applications and facts about the claystone.
In general, people use mudstone, siltstone/shales, and claystone terms interchangeably. However, all are different things at geology perspectives. Let’s know the facts first.
Mudstone:
It is a mixture of silt and clay size particles and forms a bit hardened mud. Mudstone breaks into rocky pieces.
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Introduction:
By definition, claystone is a clastic type of sedimentary rock. It chiefly consists of fine particles of less than 1/256mm size, which are cemented into hard rock.In general, people use mudstone, siltstone/shales, and claystone terms interchangeably. However, all are different things at geology perspectives. Let’s know the facts first.
How to Distinguish Claystone?
Siltstone:
Shales or siltstone is containing more than half of the composition made from silt-sized particles, such as- Coarse silt – 1/32mm (5Phi-Ø)
- Fine silt – 1/64mm (6Phi-Ø)
- Very fine silt – 1/128mm (7Phi-Ø)
Claystone:
Claystone is containing more than half of the composition made from clay-sized particles – 1/256mm (8Phi-Ø). We will see more details in the next section.Mudstone:
It is a mixture of silt and clay size particles and forms a bit hardened mud. Mudstone breaks into rocky pieces.
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