Lherzolite and Rhyodacite

Lherzolite

Rhyodacite

Definition

Lherzolite is a type of ultramafic igneous rock which contains essential olivine and clinopyroxene and orthopyroxene in equal proportions

Rhyodacite is an extrusive volcanic rock intermediate in composition between dacite and rhyolite

History

Origin

France

USA

Discoverer

Unknown

Etymology

From the Lherz Massif, an alpine peridotite complex, at Étang de Lers, near Massat in the French Pyrenees; Lherz is the archaic spelling of this location

Rhyo lite + dacite : a rock intermediate between rhyolite and dacite that is the extrusive equivalent of granodiorite

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Grenue

Earthy

Color

Black, Dark Greenish - Grey, Green, Pink, Purple

Black to Grey, Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Acid Resistant

Yes

Appearance

Glassy, Vesicular and Foilated

Skeletal

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Homes, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

As Building Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

Landscaping, Manufacture of Magnesium and Dolomite Refractories, Used for flooring, stair treads, borders and window sills.

As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Sculpture

Artifacts

Other Uses

Commercial Uses

As armour rock for sea walls, Source of Magnesia (MgO), Used in aquariums

Cemetery Markers, Creating Artwork

Types

Garnet Lherzolite

Not Available

Features

Host Rock for Lead

Available in Lots of Colors and Patterns

Archaeological Significance

Monuments

Not Yet Used

Famous Monuments

Not Applicable

Sculpture

Used

Not Yet Used

Famous Sculptures

Data Not Available

Not Applicable

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Not Yet Used

Fossils

Absent

Formation

Lherzolite 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.

Rhyodacite 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.

Composition

Mineral Content

Harzburgite, Olivine, Pyroxene, Pyrrhotite

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

CaO, Cr, Chromium(III) Oxide, MgO

Ca, Fe, Potassium Oxide, NA, Potassium, Silicon Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

6.5

5.5-6

Grain Size

Fine Grained

Fracture

Conchoidal

Streak

White

Black

Porosity

Less Porous

Luster

Subvitreous to Dull

Greasy to Dull

Compressive Strength

290.00 N/mm²

200.50 N/mm²

Cleavage

Perfect

Not Available

Toughness

2.7

2.1

Specific Gravity

2.86

2.34-2.40

Transparency

Opaque

Density

2.8-2.9 g/cm³

Not Available

Thermal Properties

Specific Heat Capacity

0.95 kJ/Kg K

1.12 kJ/Kg K

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia, South Korea

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

Africa

Western Africa

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

Europe

United Kingdom

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland

Others

Not Yet Found

Deposits in Western Continents

North America

USA

Canada, USA

South America

Not Yet Found

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

Not Yet Found

Summary >>

<< Reserves

All about Lherzolite and Rhyodacite Properties

Know all about Lherzolite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Lherzolite and Rhyodacite belong to Igneous Rocks.Texture of Lherzolite is Grenue whereas that of Rhyodacite is Earthy. Lherzolite appears Glassy, Vesicular and Foilated and Rhyodacite appears Skeletal. The luster of Lherzolite is subvitreous to dull while that of Rhyodacite is greasy to dull. Lherzolite is available in black, dark greenish - grey, green, pink, purple colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Lherzolite are as armour rock for sea walls, source of magnesia (mgo), used in aquariums and that of Rhyodacite are cemetery markers, creating artwork.