Definition
Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt
  
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
  
History
  
  
Origin
Iceland
  
France
  
Discoverer
Unknown
  
Alexandre Brongniart
  
Etymology
From German Tachylite, from tachy- + Greek lutos soluble, melting
  
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
  
Class
Igneous Rocks
  
Sedimentary Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Volcanic
  
Not Applicable
  
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
  
Coarse Grained Rock, Opaque Rock
  
Texture
Vitreous
  
Clastic
  
Color
Black, Dark Brown
  
Reddish Brown
  
Maintenance
More
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
No
  
Yes
  
Stain Resistant
No
  
Yes
  
Wind Resistant
Yes
  
No
  
Acid Resistant
Yes
  
Yes
  
Appearance
Glassy
  
Rough and Dull
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Interior Decoration
  
Decorative Aggregates, Homes, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
  
Paving Stone, Office Buildings
  
Other Architectural Uses
Curbing
  
Whetstones
  
Industry
  
  
Construction Industry
Cutting Tool, Knives, Landscaping, Scrapers
  
Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Artifacts
  
Artifacts, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Cemetery Markers, Creating Artwork
  
In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones
  
Types
Not Available
  
Not Available
  
Features
Available in Lots of Colors and Patterns, Clasts are smooth to touch, NA
  
Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock
  
Archaeological Significance
  
  
Monuments
Not Yet Used
  
Not Yet Used
  
Famous Monuments
Not Applicable
  
Not Applicable
  
Sculpture
Not Yet Used
  
Used
  
Famous Sculptures
Not Applicable
  
Data Not Available
  
Pictographs
Used
  
Not Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Not Yet Used
  
Used
  
Fossils
Absent
  
Present
  
Formation
Tachylite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
  
Arkose rock forms from the weathering of feldspar-rich igneous or metamorphic rock, most commonly granitic rocks, which are primarily composed of quartz and feldspar.
  
Composition
  
  
Mineral Content
Feldspar, Olivine
  
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz
  
Compound Content
Fe, Mg
  
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide
  
Transformation
  
  
Metamorphism
Yes
  
No
  
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
  
Not Applicable
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion
  
Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
  
Physical Properties
  
  
Hardness
5.5
  
6-7
  
Grain Size
Medium to Fine Coarse Grained
  
Coarse Grained
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
Vermilion
  
White
  
Porosity
Less Porous
  
Highly Porous
  
Luster
Resinous
  
Dull
  
Compressive Strength
206.00 N/mm
2
  
8
Not Available
  
Cleavage
Not Available
  
Not Available
  
Toughness
Not Available
  
Not Available
  
Specific Gravity
2.4
  
0
  
Transparency
Opaque
  
Opaque
  
Density
3.058 g/cm3
  
Not Available
  
Thermal Properties
  
  
Specific Heat Capacity
0.56 kJ/Kg K
  
22
Not Available
  
Resistance
Heat Resistant, Impact Resistant, Wear Resistant
  
Heat Resistant, Impact Resistant, Pressure Resistant
  
Deposits in Eastern Continents
  
  
Asia
Cambodia, Russia, South Korea
  
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan
  
Africa
East Africa
  
Namibia, Nigeria, South Africa
  
Europe
England, Germany, Hungary, Iceland, Scotland, Sweden
  
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
  
Others
Hawaii Islands
  
Greenland
  
Deposits in Western Continents
  
  
North America
USA
  
Canada, USA
  
South America
Not Yet Found
  
Brazil
  
Deposits in Oceania Continent
  
  
Australia
Victoria
  
New South Wales, New Zealand
  
Tachylite vs Arkose Characteristics
Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Tachylite vs Arkose characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Tachylite and Properties of Arkose. Learn more about Tachylite vs Arkose in the next section. The interior uses of Tachylite include Decorative aggregates and Interior decoration whereas the interior uses of Arkose include Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Tachylite and Arkose, they have various applications in construction industry. The uses of Tachylite in construction industry include Cutting tool, Knives, Landscaping, Scrapers and that of Arkose include Cement manufacture, Construction aggregate, For road aggregate, Production of glass and ceramics, Raw material for the manufacture of mortar.
More about Tachylite and Arkose
Here you can know more about Tachylite and Arkose. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Tachylite and Arkose consists of mineral content and compound content. The mineral content of Tachylite includes Feldspar, Olivine and mineral content of Arkose includes Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz. You can also check out the list of all Igneous Rocks. When we have to compare Tachylite vs Arkose, the texture, color and appearance plays an important role in determining the type of rock. Tachylite is available in black, dark brown colors whereas, Arkose is available in reddish brown colors. Appearance of Tachylite is Glassy and that of Arkose is Rough and Dull. Properties of rock is another aspect for Tachylite vs Arkose. The hardness of Tachylite is 5.5 and that of Arkose is 6-7. The types of Tachylite are Not Available whereas types of Arkose are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Tachylite is vermilion while that of Arkose is white. The specific heat capacity of Tachylite is 0.56 kJ/Kg K and that of Arkose is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Tachylite is heat resistant, impact resistant, wear resistant whereas Arkose is heat resistant, impact resistant, pressure resistant.