Definition
Trachyandesite is an extrusive igneous rock.
History
Origin
Indonesia
Discoverer
Unknown
Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
Class
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Texture
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Color
Black, Brown, Light to Dark Grey
Maintenance
Less
Durability
Durable
Water Resistant
✔
✘
81% - Igneous Rocks Rocks have it !
Scratch Resistant
✔
✘
86% - Igneous Rocks Rocks have it !
Stain Resistant
✔
✘
66% - Igneous Rocks Rocks
Wind Resistant
✔
✘
49% - Igneous Rocks Rocks
Acid Resistant
✔
✘
48% - Igneous Rocks Rocks
Appearance
Dull and Soft
Architecture
Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
Other Architectural Uses
Curbing
Industry
Construction Industry
Building houses or walls, Cobblestones, for Road Aggregate, Rail Track Ballast, Roadstone
Medical Industry
-
Antiquity Uses
Artifacts, Sculpture
Other Uses
Commercial Uses
Creating Artwork, Pottery
Types
Basaltic Trachyandesite
Features
Has High structural resistance against erosion and climate, Very fine grained rock
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Absent
Formation
Trachyandesite 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.
Composition
Mineral Content
Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase
Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Transformation
Metamorphism
✔
✘
97% - Igneous Rocks Rocks have it !
Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Weathering
✔
✘
99% - Igneous Rocks Rocks have it !
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Erosion
✔
✘
92% - Igneous Rocks Rocks have it !
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Physical Properties
Hardness
4-5
1
7
👆🏻
Grain Size
Fine Grained
Fracture
Conchoidal
Streak
Light to dark brown
Porosity
Less Porous
Luster
Earthy
Compressive Strength
37.40 N/mm2
Rank: 42 (Overall)
0.15
450
👆🏻
Cleavage
Perfect
Toughness
2.3
Specific Gravity
2.8-3
0
8.4
👆🏻
Transparency
Opaque
Density
2.9-3.1 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.84 kJ/Kg K
Rank: 15 (Overall)
0.14
3.2
👆🏻
Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
India, Russia
Africa
South Africa
Europe
Iceland
Others
-
Deposits in Western Continents
North America
Canada, USA
South America
Brazil
Deposits in Oceania Continent
Australia
-