1 Definition
1.1 Definition
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
1.4 History
1.4.2 Origin
1.4.4 Discoverer
1.5 Etymology
From Andes mountains, where it is found in abundance
From Cornish gossen from gos, blood from Old Cornish guit
1.8 Class
Igneous Rocks
Metamorphic Rocks
1.8.2 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
1.9 Family
1.10.1 Group
1.12 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock
3 Texture
3.2 Texture
Aphanitic to Porphyritic
Rough, Sandy
3.4 Color
Bluish - Grey, Grey, Pink, Yellow
Brown, Brown- Black, Gold, Green, Rust
3.6 Maintenance
3.8 Durability
3.8.2 Water Resistant
3.8.4 Scratch Resistant
3.8.6 Stain Resistant
3.8.8 Wind Resistant
3.8.10 Acid Resistant
3.10 Appearance
Dull and Soft
Dull and Banded
5 Uses
5.1 Architecture
5.1.1 Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
Countertops, Decorative Aggregates, Interior Decoration
5.1.3 Exterior Uses
Office Buildings, Roof Tiles
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
5.1.5 Other Architectural Uses
5.3 Industry
5.3.1 Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
5.3.3 Medical Industry
Not Yet Used
Not Yet Used
5.5 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Artifacts
5.7 Other Uses
5.7.2 Commercial Uses
Commemorative Tablets, Creating Artwork
Cemetery Markers, Commemorative Tablets, Gemstone
6 Types
7.1 Types
Icelandite
Translocated gossan and Leakage gossan
7.3 Features
Generally rough to touch, High silica content, Is one of the oldest rock
Clasts are smooth to touch, Easily splits into thin plates
7.5 Archaeological Significance
7.6.1 Monuments
7.6.3 Famous Monuments
Middle of the Earth in Ecuador
Not Applicable
7.6.5 Sculpture
7.6.7 Famous Sculptures
Data Not Available
Not Applicable
7.6.9 Pictographs
7.6.11 Petroglyphs
7.6.13 Figurines
7.7 Fossils
8 Formation
8.1 Formation
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.
Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.
9.2 Composition
9.2.1 Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon
Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon
9.3.2 Compound Content
Silicon Dioxide
Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur
9.4 Transformation
9.4.1 Metamorphism
9.5.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Not Applicable
9.5.4 Weathering
9.5.6 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Not Applicable
9.5.8 Erosion
9.5.10 Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Chemical Erosion, Sea Erosion, Wind Erosion
10 Properties
10.1 Physical Properties
11.0.1 Hardness
11.1.8 Grain Size
Very fine-grained
Fine to Medium Grained
11.1.9 Fracture
11.1.10 Streak
11.1.11 Porosity
Less Porous
Highly Porous
11.1.12 Luster
11.1.13 Compressive Strength
11.1.17 Cleavage
Not Available
Not Available
11.1.19 Toughness
11.1.21 Specific Gravity
11.1.22 Transparency
11.1.23 Density
2.11-2.36 g/cm3Not Available
0
1400
11.3 Thermal Properties
11.3.1 Specific Heat Capacity
2.39 kJ/Kg K0.24 kJ/Kg K
0.14
3.2
12.3.2 Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant
13 Reserves
13.1 Deposits in Eastern Continents
13.1.1 Asia
India, Indonesia, Japan, Nepal, South Korea
China, India, Indonesia, Russia, Singapore, South Korea
13.1.2 Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
Cape Verde, Ethiopia, Ghana, South Africa, Western Africa
13.1.3 Europe
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
Albania, France, Germany, Great Britain, United Kingdom
13.1.4 Others
Not Yet Found
Not Yet Found
13.2 Deposits in Western Continents
13.2.1 North America
13.2.2 South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Brazil, Colombia, Ecuador
13.3 Deposits in Oceania Continent
13.3.1 Australia
New South Wales, New Zealand, Western Australia
New South Wales, South Australia, Western Australia