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Rhyolite and Laterite


Laterite and Rhyolite


Definition

Definition
Rhyolite is a fine-grained igneous rock which is rich in silica  
Laterite rock is a type of Sedimentary rock which is rich in iron and aluminium, formed in hot and wet tropical areas  

History
  
  

Origin
North America  
India  

Discoverer
Ferdinand von Richthofen  
Francis Buchanan-Hamilton  

Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone  
From Latin later brick, tile + -ite1  

Class
Igneous Rocks  
Sedimentary Rocks  

Sub-Class
Durable Rock, Hard Rock  
Durable Rock, Soft Rock  

Family
  
  

Group
Volcanic  
-  

Other Categories
Coarse Grained Rock, Opaque Rock  
Fine Grained Rock, Opaque Rock  

Texture

Texture
Aphanitic, Glassy, Porphyritic  
Earthy, Massive, Porphyritic  

Color
Grey, White, Light Black  
Brown, Buff, Red  

Maintenance
More  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
No  

Scratch Resistant
Yes  
No  

Stain Resistant
Yes  
No  

Wind Resistant
Yes  
No  

Acid Resistant
Yes  
No  

Appearance
Banded  
Rough and Banded  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens  
Decorative Aggregates, Flooring, Interior Decoration  

Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Office Buildings  
As Building Stone, As Facing Stone, Garden Decoration  

Other Architectural Uses
-  
Curbing  

Industry
  
  

Construction Industry
Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives  
Cobblestones, for Road Aggregate, Landscaping, Roadstone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Gemstone, Laboratory bench tops, Jewelry  
An Oil and Gas Reservoir, Source of bauxite, Used in aquariums  

Types

Types
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.  
Laterite  

Features
Acidic in nature, Available in lots of colors  
Is one of the oldest rock, Very fine grained rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Present  

Formation

Formation
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.  
Laterite is a type of sedimentary rock which is generally a reddish weathering product of basalt.   

Composition
  
  

Mineral Content
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz  
Aluminum Oxides, Biotite, Hematite, Hornblade, Iron Oxides, Manganese Oxides, Micas, Muscovite or Illite, Plagioclase, Pyroxene  

Compound Content
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium  
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  

Transformation
  
  

Metamorphism
Yes  
No  

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism  
-  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering  
Biological Weathering, Chemical Weathering  

Erosion
Yes  
Yes  

Types of Erosion
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion  
Chemical Erosion, Water Erosion, Wind Erosion  

Properties

Physical Properties
  
  

Hardness
6-7  
2  

Grain Size
Large and Coarse Grained  
Fine Grained  

Fracture
Sub-conchoidal  
Conchoidal  

Streak
-  
White  

Porosity
Highly Porous  
Highly Porous  

Luster
Earthy  
Dull  

Compressive Strength
140.00 N/mm2  
23
5.00 N/mm2  
99+

Cleavage
-  
-  

Toughness
2  
-  

Specific Gravity
2.65-2.67  
-9999  

Transparency
Opaque  
Opaque  

Density
2.4-2.6 g/cm3  
-9999 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.71 kJ/Kg K  
23
0.92 kJ/Kg K  
10

Resistance
Heat Resistant, Wear Resistant  
Heat Resistant, Pressure Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India  
India  

Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa  
East Africa, Western Africa  

Europe
Germany, Iceland, Ireland, Italy, Spain  
England, Romania, Scotland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
Canada, USA  

South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela  
-  

Deposits in Oceania Continent
  
  

Australia
New Zealand, Queensland, Western Australia  
Central Australia, Western Australia  

Summary >>
<< Reserves

All about Rhyolite and Laterite Properties

Know all about Rhyolite and Laterite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyolite belongs to Igneous Rocks while Laterite belongs to Sedimentary Rocks.Texture of Rhyolite is Aphanitic, Glassy, Porphyritic whereas that of Laterite is Earthy, Massive, Porphyritic. Rhyolite appears Banded and Laterite appears Rough and Banded. The luster of Rhyolite is earthy while that of Laterite is dull. Rhyolite is available in grey, white, light black colors whereas Laterite is available in brown, buff, red colors. The commercial uses of Rhyolite are gemstone, laboratory bench tops, jewelry and that of Laterite are an oil and gas reservoir, source of bauxite, used in aquariums.

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