1 Definition
1.1 Definition
Trachyandesite is an extrusive igneous rock.
Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
1.2 History
1.2.1 Origin
Indonesia
Western Australia, Minnesota
1.2.2 Discoverer
1.3 Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
From its formation process
1.4 Class
Igneous Rocks
Sedimentary Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Banded, Trellis
2.2 Color
Black, Brown, Light to Dark Grey
Red, Reddish Brown
2.3 Maintenance
2.4 Durability
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
1.0.1 Acid Resistant
1.2 Appearance
Dull and Soft
Layered, Banded, Veined and Shiny
2 Uses
2.1 Architecture
2.1.1 Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Homes
2.1.3 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
Paving Stone, Office Buildings
2.2.1 Other Architectural Uses
Curbing
Curbing, Whetstones
2.3 Industry
2.3.1 Construction Industry
Building houses or walls, Cobblestones, for Road Aggregate, Rail Track Ballast, Roadstone
As Dimension Stone, Used for flooring, stair treads, borders and window sills.
2.4.1 Medical Industry
Not Yet Used
Not Yet Used
2.5 Antiquity Uses
Artifacts, Sculpture
Artifacts
2.6 Other Uses
2.6.1 Commercial Uses
Creating Artwork, Pottery
As a touchstone, Cemetery Markers, Creating Artwork
3 Types
3.1 Types
Basaltic Trachyandesite
Algoma-type , Lake Superior-type, Superior-type and Taconite
3.2 Features
Has High structural resistance against erosion and climate, Very fine grained rock
Is one of the oldest rock
3.4 Archaeological Significance
3.4.1 Monuments
Not Yet Used
Not Yet Used
4.1.1 Famous Monuments
Not Applicable
Not Applicable
4.2.1 Sculpture
4.3.1 Famous Sculptures
Data Not Available
Not Applicable
4.3.2 Pictographs
4.4.1 Petroglyphs
4.4.3 Figurines
4.5 Fossils
5 Formation
5.1 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.
The banded iron layers are formed in sea water when oxygen is released by photosynthetic cyano-bacteria. The oxygen then combines with dissolved iron in ocean to form insoluble iron oxides, which precipitated out, forming a thin layer of banded iron formation on ocean floor.
5.2 Composition
5.2.1 Mineral Content
Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase
Hematite, Magnetite, Quartz
5.2.3 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Fe, Iron(III) Oxide, Silicon Dioxide
5.3 Transformation
5.3.1 Metamorphism
5.3.3 Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Not Applicable
5.3.4 Weathering
5.4.1 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Weathering
6.1.1 Erosion
6.1.3 Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Coastal Erosion, Wind Erosion
7 Properties
7.1 Physical Properties
7.1.1 Hardness
10.1.2 Grain Size
Fine Grained
Large and Coarse Grained
10.1.3 Fracture
Conchoidal
Uneven, Splintery or Conchoidal
10.1.4 Streak
Light to dark brown
White
10.1.5 Porosity
Less Porous
Highly Porous
10.1.6 Luster
10.1.7 Compressive Strength
10.1.14 Cleavage
10.1.15 Toughness
10.1.16 Specific Gravity
10.1.17 Transparency
Opaque
Translucent to Opaque
10.1.18 Density
2.9-3.1 g/cm3Not Available
0
1400
10.2 Thermal Properties
10.2.1 Specific Heat Capacity
0.84 kJ/Kg K3.20 kJ/Kg K
0.14
3.2
10.3.2 Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
11 Reserves
11.1 Deposits in Eastern Continents
11.1.1 Asia
India, Russia
China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam
11.1.2 Africa
South Africa
Kenya, Morocco, South Africa, Tanzania
11.1.3 Europe
Iceland
Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom
11.1.4 Others
Not Yet Found
Greenland, Mid-Atlantic Ridge
11.2 Deposits in Western Continents
11.2.1 North America
Canada, USA
Canada, Mexico, USA
11.2.2 South America
11.3 Deposits in Oceania Continent
11.3.1 Australia
Not Yet Found
New South Wales, Queensland, South Australia, Western Australia