Definition
Basanite is a black basaltic rock which mainly contains plagioclase, augite, olivine and nepheline and is formerly used as a touchstone
Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt
Discoverer
Unknown
Unknown
Etymology
From Latin basanites + -ite
From German Tachylite, from tachy- + Greek lutos soluble, melting
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Texture
Aphanitic to Porphyritic
Vitreous
Color
Black, Brown, Green, Grey, Red, White
Black, Dark Brown
Durability
Durable
Durable
Appearance
Glassy or Pearly
Glassy
Interior Uses
Decorative Aggregates, Homes
Decorative Aggregates, Interior Decoration
Exterior Uses
As Building Stone, Garden Decoration, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
Other Architectural Uses
Whetstones
Curbing
Construction Industry
Arrowheads, Construction Aggregate, Cutting Tool, Spear Points
Cutting Tool, Knives, Landscaping, Scrapers
Antiquity Uses
Artifacts, Monuments
Artifacts
Commercial Uses
As a touchstone, Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms
Cemetery Markers, Creating Artwork
Types
Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite
Volcanic glass
Features
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone
Available in Lots of Colors and Patterns, Clasts are smooth to touch
Archaeological Significance
Formation
Basanite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes.
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.
Mineral Content
Augite, Feldspar, Ilmenite, Olivine, Plagioclase
Feldspar, Olivine
Compound Content
Potassium Oxide, Sodium Oxide, Silicon Dioxide
Fe, Mg
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Types of Weathering
Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion
Grain Size
Fine Grained
Medium to Fine Coarse Grained
Fracture
Uneven, Splintery or Conchoidal
Conchoidal
Porosity
Highly Porous
Less Porous
Luster
Waxy and Dull
Resinous
Specific Gravity
2.5-2.8
2.4
Transparency
Translucent to Opaque
Opaque
Density
2.7 g/cm3
3.058 g/cm3
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
-
Cambodia, Russia, South Korea
Africa
Uganda
East Africa
Europe
Germany, Hungary, Italy, Spain
England, Germany, Hungary, Iceland, Scotland, Sweden
Others
Greenland, Mid-Atlantic Ridge
Hawaii Islands
Deposits in Western Continents
South America
Bolivia, Brazil
-
Deposits in Oceania Continent
Australia
New South Wales, New Zealand, Queensland, South Australia, Western Australia
Victoria
All about Basanite and Tachylite Properties
Know all about Basanite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Basanite and Tachylite belong to Igneous Rocks.Texture of Basanite is Aphanitic to Porphyritic whereas that of Tachylite is Vitreous. Basanite appears Glassy or Pearly and Tachylite appears Glassy. The luster of Basanite is waxy and dull while that of Tachylite is resinous. Basanite is available in black, brown, green, grey, red, white colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Basanite are as a touchstone, creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Tachylite are cemetery markers, creating artwork.