1 Definition
1.1 Definition
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
1.2 History
1.2.1 Origin
Indonesia
1.2.2 Discoverer
Cornish Gossen
1.3 Etymology
From Cornish gossen from gos, blood from Old Cornish guit
1.4 Class
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Not Applicable
1.6 Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Rough, Sandy
2.2 Color
Brown, Brown- Black, Gold, Green, Rust
2.3 Maintenance
Less
2.4 Durability
Durable
2.4.1 Water Resistant
✔
✘
81% - Metamorphic Rocks Rocks have it !
▶
2.4.2 Scratch Resistant
✔
✘
65% - Metamorphic Rocks Rocks have it !
▶
2.4.3 Stain Resistant
✔
✘
42% - Metamorphic Rocks Rocks have it !
▶
2.4.4 Wind Resistant
✔
✘
19% - Metamorphic Rocks Rocks have it !
▶
2.4.5 Acid Resistant
✔
✘
15% - Metamorphic Rocks Rocks have it !
▶
2.5 Appearance
Dull and Banded
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Countertops, Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
3.1.3 Other Architectural Uses
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
3.2.2 Medical Industry
Not Yet Used
3.3 Antiquity Uses
Artifacts
3.4 Other Uses
3.4.1 Commercial Uses
Cemetery Markers, Commemorative Tablets, Gemstone
4 Types
4.1 Types
Translocated gossan and Leakage gossan
4.2 Features
Clasts are smooth to touch, Easily splits into thin plates
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
4.3.2 Famous Monuments
Not Applicable
4.3.3 Sculpture
Not Yet Used
4.3.4 Famous Sculptures
Not Applicable
4.3.5 Pictographs
Used
4.3.6 Petroglyphs
Used
4.3.7 Figurines
Not Yet Used
4.4 Fossils
Absent
5 Formation
5.1 Formation
Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.
5.2 Composition
5.2.1 Mineral Content
Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon
5.2.2 Compound Content
Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur
5.3 Transformation
5.3.1 Metamorphism
✔
✘
50% - Metamorphic Rocks Rocks have it !
▶
5.3.2 Types of Metamorphism
Not Applicable
5.3.3 Weathering
✔
✘
65% - Metamorphic Rocks Rocks have it !
▶
5.3.4 Types of Weathering
Not Applicable
5.3.5 Erosion
✔
✘
77% - Metamorphic Rocks Rocks have it !
▶
5.3.6 Types of Erosion
Chemical Erosion, Sea Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
4-5
Check 4-5 Range Rocks!
1
7
6.1.2 Grain Size
Fine to Medium Grained
6.1.3 Fracture
Conchoidal
6.1.4 Streak
White to Grey
6.1.5 Porosity
Highly Porous
6.1.6 Luster
Metallic
6.1.7 Compressive Strength
Not Available
Rank: N/A (Overall) ▶
0.15
450
6.1.8 Cleavage
Not Available
6.1.9 Toughness
Not Available
6.1.10 Specific Gravity
2.0
Check 2.0 Range Rocks!
0
8.4
6.1.11 Transparency
Opaque
6.1.12 Density
Not Available
Check Not Available Range Rocks!
0
1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
0.24 kJ/Kg K
Rank: 24 (Overall) ▶
0.14
3.2
6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
China, India, Indonesia, Russia, Singapore, South Korea
7.1.2 Africa
Cape Verde, Ethiopia, Ghana, South Africa, Western Africa
7.1.3 Europe
Albania, France, Germany, Great Britain, United Kingdom
7.1.4 Others
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
7.2.2 South America
Brazil, Colombia, Ecuador
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, South Australia, Western Australia