1 Definition
1.1 Definition
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
1.2 History
1.2.1 Origin
7.3.2 Discoverer
Alexandre Brongniart
Unknown
7.4 Etymology
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
from French néphéline, from Greek nephelē
7.5 Class
Sedimentary Rocks
Igneous Rocks
7.5.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
7.6 Family
7.6.1 Group
7.7 Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
8 Texture
8.1 Texture
8.2 Color
Reddish Brown
Black, Brown, Colourless, Green, Grey, White
8.3 Maintenance
8.4 Durability
8.4.1 Water Resistant
8.4.2 Scratch Resistant
8.4.3 Stain Resistant
8.4.4 Wind Resistant
8.4.5 Acid Resistant
8.5 Appearance
9 Uses
9.1 Architecture
9.1.1 Interior Uses
Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
9.1.2 Exterior Uses
Paving Stone, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
9.1.3 Other Architectural Uses
9.2 Industry
9.2.1 Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
9.2.2 Medical Industry
Not Yet Used
Not Yet Used
9.3 Antiquity Uses
Artifacts, Sculpture, Small Figurines
Artifacts, Monuments, Sculpture, Small Figurines
9.4 Other Uses
9.4.1 Commercial Uses
In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones
Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
10 Types
10.1 Types
Not Available
Peralkaline Nephelinite
10.2 Features
Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock
Host Rock for Lead
10.3 Archaeological Significance
10.3.1 Monuments
10.3.2 Famous Monuments
Not Applicable
Data Not Available
10.3.3 Sculpture
10.3.4 Famous Sculptures
Data Not Available
Data Not Available
10.3.5 Pictographs
10.3.6 Petroglyphs
10.3.7 Figurines
10.4 Fossils
11 Formation
11.1 Formation
Arkose rock forms from the weathering of feldspar-rich igneous or metamorphic rock, most commonly granitic rocks, which are primarily composed of quartz and feldspar.
Nephelinite 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.
11.2 Composition
11.2.1 Mineral Content
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz
Clinopyroxene, Nepheline, Plagioclase
11.2.2 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide
Ca, CaO, Carbon, Cl, MgO
11.3 Transformation
11.3.1 Metamorphism
11.3.2 Types of Metamorphism
Not Applicable
Contact Metamorphism
11.3.3 Weathering
11.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
11.3.5 Erosion
11.3.6 Types of Erosion
Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Water Erosion, Wind Erosion
12 Properties
12.1 Physical Properties
12.1.1 Hardness
12.1.2 Grain Size
Coarse Grained
Fine Grained
12.1.3 Fracture
12.1.4 Streak
12.1.5 Porosity
Highly Porous
Less Porous
12.1.6 Luster
Dull
Vitreous to Metallic
12.1.7 Compressive Strength
12.1.8 Cleavage
12.1.9 Toughness
12.1.10 Specific Gravity
12.1.11 Transparency
12.1.12 Density
Not Available2.5-3 g/cm3
0
1400
12.2 Thermal Properties
12.2.1 Specific Heat Capacity
12.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Heat Resistant
13 Reserves
13.1 Deposits in Eastern Continents
13.1.1 Asia
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan
Japan
13.1.2 Africa
Namibia, Nigeria, South Africa
Rwanda, Tanzania
13.1.3 Europe
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
Not Yet Found
13.1.4 Others
13.2 Deposits in Western Continents
13.2.1 North America
13.2.2 South America
13.3 Deposits in Oceania Continent
13.3.1 Australia
New South Wales, New Zealand
Not Yet Found