Mudstone and Flint
Definition
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
Flint is a hard type of sedimentary rock that produces a small piece of burning material when hit by steel
History
Discoverer
Unknown
Unknown
Etymology
From the English mud and stone, from low German mudde and stainaz
From Old English flint - a type of rock mainly known for high hardness and for giving off sparks when struck
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
Not Applicable
Not Applicable
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Texture
Clastic
Banded, Rough
Color
Black, Blue, Brown, Green, Grey, Orange, Red, White, Yellow
Black, Brown, Green, Grey, Red, White
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
Yes
Yes
Scratch Resistant
No
Yes
Stain Resistant
No
Yes
Wind Resistant
No
Yes
Acid Resistant
No
No
Appearance
Rough and Dull
Glassy or Pearly
Uses
Architecture
Interior Uses
Decorative Aggregates, Entryways, Floor Tiles, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Roof Tiles
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
Arrowheads, Cutting Tool, Spear Points
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Sculpture, Small Figurines
Artifacts
Other Uses
Commercial Uses
Creating Artwork, Pottery
Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms
Types
Types
Marl, Shale and Argillite
Not Available
Features
Available in Lots of Colors and Patterns, Smooth to touch, Very fine grained rock
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate
Archaeological Significance
Monuments
Not Yet Used
Not Yet Used
Famous Monuments
Not Applicable
Not Applicable
Sculpture
Used
Not Yet Used
Famous Sculptures
Data Not Available
Not Applicable
Pictographs
Used
Not Used
Petroglyphs
Used
Not Used
Figurines
Used
Not Yet Used
Fossils
Present
Present
Formation
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.
Flint is formed by the decomposition and compaction of various organisms such as sponges and diatoms under the water.
Composition
Mineral Content
Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz
Silicon
Compound Content
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide
Silicon Dioxide
Transformation
Metamorphism
No
No
Types of Metamorphism
Not Applicable
Not Applicable
Weathering
Yes
No
Types of Weathering
Chemical Weathering, Mechanical Weathering
Not Applicable
Erosion
Yes
Yes
Types of Erosion
Chemical Erosion, Sea Erosion
Chemical Erosion, Coastal Erosion, Water Erosion
Properties
Physical Properties
Hardness
2-3
7
Grain Size
Very fine-grained
Very fine-grained
Fracture
Not Available
Conchoidal
Streak
White
White
Porosity
Highly Porous
Highly Porous
Luster
Dull
Vitreous
Compressive Strength
Not Available
450.00 N/mm2
1
Cleavage
Perfect
Non-Existent
Toughness
2.6
1.5
Specific Gravity
2.2-2.8
2.5-2.8
Transparency
Opaque
Translucent to Opaque
Density
2.4-2.8 g/cm3
2.7-2.71 g/cm3
Thermal Properties
Specific Heat Capacity
0.39 kJ/Kg K
23
0.74 kJ/Kg K
19
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Reserves
Deposits in Eastern Continents
Asia
Bangladesh, China, India, Russia
Azerbaijan, China, Russia
Africa
Ethiopia, Kenya, Morocco, South Africa, Tanzania
Not Yet Found
Europe
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland
Austria, Belgium, Cyprus, Denmark, France, Germany, Italy, Malta, Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
USA
USA
South America
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Bolivia
Deposits in Oceania Continent
Australia
New South Wales, New Zealand, Queensland, Victoria, Western Australia
New Zealand, South Australia
All about Mudstone and Flint Properties
Know all about Mudstone and Flint properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone and Flint belong to Sedimentary Rocks.Texture of Mudstone is Clastic whereas that of Flint is Banded, Rough. Mudstone appears Rough and Dull and Flint appears Glassy or Pearly. The luster of Mudstone is dull while that of Flint is vitreous. Mudstone and Flint are available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Mudstone are creating artwork, pottery and that of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.
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