Definition
Mudstone is a fine-grained, dark gray sedimentary rock, which is formed from silt and clay and is similar to shale but has less laminations
History
Origin
-
Discoverer
William Smith
Etymology
From the English mud and stone, from low German mudde and stainaz
Class
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Family
Group
-
Other Categories
Fine Grained Rock, Opaque Rock
Texture
Clastic
Color
Black, Blue, Brown, Green, Grey, Orange, Red, White, Yellow
Maintenance
Less
Durability
Durable
Water Resistant
✔
✘
58% - Sedimentary Rocks Rocks have it !
Scratch Resistant
✔
✘
61% - Sedimentary Rocks Rocks
Stain Resistant
✔
✘
42% - Sedimentary Rocks Rocks
Wind Resistant
✔
✘
36% - Sedimentary Rocks Rocks
Acid Resistant
✔
✘
19% - Sedimentary Rocks Rocks
Appearance
Rough and Dull
Architecture
Interior Uses
Decorative Aggregates, Entryways, Floor Tiles, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Roof Tiles
Other Architectural Uses
Curbing
Industry
Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
Medical Industry
-
Antiquity Uses
Sculpture, Small Figurines
Other Uses
Commercial Uses
Creating Artwork, Pottery
Types
Marl, Shale and Argillite
Features
Available in Lots of Colors and Patterns, Smooth to touch, Very fine grained rock
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Present
Formation
Mudstone forms when very fine-grained clay particles are deposited in water which settle at the bottom of water bodies. They are buried and compacted by overlying sediment hence forming mudstone.
Composition
Mineral Content
Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz
Compound Content
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide
Transformation
Metamorphism
✔
✘
17% - Sedimentary Rocks Rocks
Types of Metamorphism
-
Weathering
✔
✘
78% - Sedimentary Rocks Rocks have it !
Types of Weathering
Chemical Weathering, Mechanical Weathering
Erosion
✔
✘
86% - Sedimentary Rocks Rocks have it !
Types of Erosion
Chemical Erosion, Sea Erosion
Physical Properties
Hardness
2-3
1
7
👆🏻
Grain Size
Very fine-grained
Fracture
-
Streak
White
Porosity
Highly Porous
Luster
Dull
Compressive Strength
25.00 N/mm2
Rank: 45 (Overall)
0.15
450
👆🏻
Cleavage
Perfect
Toughness
2.6
Specific Gravity
2.2-2.8
0
8.4
👆🏻
Transparency
Opaque
Density
2.4-2.8 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.39 kJ/Kg K
Rank: 30 (Overall)
0.14
3.2
👆🏻
Resistance
Heat Resistant, Impact Resistant
Deposits in Eastern Continents
Asia
Bangladesh, China, India, Russia
Africa
Ethiopia, Kenya, Morocco, South Africa, Tanzania
Europe
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland
Others
-
Deposits in Western Continents
North America
USA
South America
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Deposits in Oceania Continent
Australia
New South Wales, New Zealand, Queensland, Victoria, Western Australia