Rhyodacite and Pyrolite

Rhyodacite

Pyrolite

Pyrolite and Rhyodacite

Definition

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

Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt

History

Origin

USA

Pike County, U.S

Discoverer

Unknown

Etymology

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

From the chemical and mineralogical composition of the upper mantle of the Earth

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Earthy

Phaneritic

Color

Black to Grey, Dark Greenish - Grey

Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Wind Resistant

Acid Resistant

Yes

Appearance

Skeletal

Rough and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, Garden Decoration

As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As Dimension Stone, Cobblestones

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

Types

Not Available

Dunite, Wehrlite, Harzburgite, Lherzolite

Features

Available in Lots of Colors and Patterns

Constitutes upper part of the Earth's mantle, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Not Yet Used

Used

Famous Monuments

Not Applicable

Data Not Available

Sculpture

Not Yet Used

Used

Famous Sculptures

Not Applicable

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Not Yet Used

Used

Fossils

Absent

Formation

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.

Pyrolite 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

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

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

Compound Content

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

Ca, Fe, Mg, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

Transformation

Metamorphism

Yes

Types of 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, Coastal Erosion, Glacier Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.5-6

Grain Size

Fine Grained

Coarse Grained

Fracture

Conchoidal

Irregular

Streak

Black

White

Porosity

Less Porous

Luster

Greasy to Dull

Shiny

Compressive Strength

200.50 N/mm²

107.55 N/mm²

Cleavage

Not Available

Imperfect

Toughness

2.1

Specific Gravity

2.34-2.40

3-3.01

Transparency

Opaque

Translucent to Opaque

Density

Not Available

3.1-3.4 g/cm³

Thermal Properties

Specific Heat Capacity

1.12 kJ/Kg K

1.25 kJ/Kg K

Resistance

Heat Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

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

China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey

Africa

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

Morocco, South Africa

Europe

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

Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland, Venezuela

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

South America

Not Yet Found

Brazil

Deposits in Oceania Continent

Australia

Not Yet Found

New Zealand, Western Australia

Summary >>

<< Reserves

All about Rhyodacite and Pyrolite Properties

Know all about Rhyodacite and Pyrolite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite and Pyrolite belong to Igneous Rocks.Texture of Rhyodacite is Earthy whereas that of Pyrolite is Phaneritic. Rhyodacite appears Skeletal and Pyrolite appears Rough and Shiny. The luster of Rhyodacite is greasy to dull while that of Pyrolite is shiny. Rhyodacite and Pyrolite are available in black to grey, dark greenish - grey colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.