Definition
Marl is an unconsolidated sedimentary rock consisting of clay and lime
  
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 Old French marle, from Late Latin marglia
  
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
Earthy
  
Banded, Rough
  
Color
Beige, Brown, Green, Grey, White
  
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
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Floor Tiles
  
Decorative Aggregates, Homes, Interior Decoration
  
Exterior Uses
As Building 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
Artifacts, Jewellery, Sculpture, Small Figurines
  
Artifacts
  
Other Uses
  
  
Commercial Uses
Creating Artwork, Soil Conditioner
  
Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms
  
Types
Clay Marl ,Blue Marl, Red Marl, High Bank Marl, Shell Layer Marl, Under Shell Layer Marl, Sand Marl, Green Marl, Grey Marl and Clayey Marl
  
Not Available
  
Features
Generally rough to touch, Is one of the oldest rock, Splintery, 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
Marl forms when very fine-grained clay particles are deposited in water which settles at the bottom of water bodies and are compacted by overlying sediment; the water squeezes out and hence forming Marl rock.
  
Flint is formed by the decomposition and compaction of various organisms such as sponges and diatoms under the water.
  
Composition
  
  
Mineral Content
Calcite, Clay, Dolomite, Gypsum, Micas, 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
Biological Weathering, Chemical Weathering
  
Not Applicable
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
  
Chemical Erosion, Coastal Erosion, Water Erosion
  
Physical Properties
  
  
Hardness
2-3
  
7
  
Grain Size
Very fine-grained
  
Very fine-grained
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
White
  
White
  
Porosity
Highly Porous
  
Highly Porous
  
Luster
Dull
  
Vitreous
  
Compressive Strength
Not Available
  
450.00 N/mm
2
  
1
Cleavage
Not Available
  
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
Not Available
  
0.74 kJ/Kg K
  
19
Resistance
Heat Resistant, Impact Resistant
  
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
India, Pakistan, Russia
  
Azerbaijan, China, Russia
  
Africa
Ethiopia, Kenya, Morocco, South Africa
  
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
Colombia, Ecuador, Peru
  
Bolivia
  
Deposits in Oceania Continent
  
  
Australia
New South Wales, Victoria, Western Australia
  
New Zealand, South Australia
  
All about Marl and Flint Properties
Know all about Marl and Flint properties here. All properties of rocks are important as they define the type of rock and its application. Marl and Flint belong to Sedimentary Rocks.Texture of Marl is Earthy whereas that of Flint is Banded, Rough. Marl appears Rough and Dull and Flint appears Glassy or Pearly. The luster of Marl is dull while that of Flint is vitreous. Marl is available in beige, brown, green, grey, white colors whereas Flint is available in black, brown, green, grey, red, white colors. The commercial uses of Marl are creating artwork, soil conditioner 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.