Mudstone
A variety of Sedimentary
What is Mudstone?
This sedimentary rock is unusual for its superfine grains (usually clay or silt) which give it a nearly smooth appearance. Mudstones don’t have many industrial uses, as they tend to be quite soft and breakable. One variety of this stone, shale, can be used decoratively and has also been used as a roofing material for millennia. If you see a stone-tiled roof, there’s a good chance it's made of mudstone!
Uses & Applications
Mudstone is often found in close association with naturally occurring oil and gas, and it may be used to track the location of those particular reservoirs. Mudstone may also be used in the creation of pottery, bricks and roofing tiles, and cement.
Discover Values
Mudstone Market Value Calculator
Estimate the market value of Mudstone using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Mudstone Localities Map
See where Mudstone is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Rock Types of Mudstone
Mudstone can be separated into these categories: Siltstone — more than half of the composition is silt-sized particles. Claystone — more than half of the composition is clay-sized particles. Mudstone— hardened mud; a mix of silt and clay sized particles. Mudstone can include: Shale — exhibits lamination or fissility. Argillite — has undergone low-grade metamorphism.
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Quick Facts
Physical Properties
- Color
- Various colors, often brown, gray, red, black, tan
- Hardness (Mohs)
- 2 - 3
- Density
- 2.4 - 2.8 g/cm³
Chemical Properties
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