Trondhjemite

Comendite

Trondhjemite and Comendite

Trondhjemite

Comendite

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1 Definition

1.1 Definition

Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.

Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite

1.2 History

1.2.1 Origin

Tonale, Italy

Italy

1.2.2 Discoverer

Unknown

1.3 Etymology

Not Available

Comendite derives its name from the area of Le Commende on San Pietro Island in Italy

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

Volcanic

1.6 Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Phaneritic

Porphyritic

2.2 Color

Black, Brown, Light to Dark Grey, White

Blue, Bluish - Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

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81% Igneous Rocks Rocks have it !

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81% Igneous Rocks Rocks have it !

2.4.2 Scratch Resistant

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86% Igneous Rocks Rocks have it !

✔ ✘

86% Igneous Rocks Rocks have it !

2.4.3 Stain Resistant

✔ ✘

66% Igneous Rocks Rocks have it !

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66% Igneous Rocks Rocks have it !

2.4.4 Wind Resistant

✔ ✘

49% Igneous Rocks Rocks have it !

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49% Igneous Rocks Rocks have it !

2.4.5 Acid Resistant

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48% Igneous Rocks Rocks have it !

✔ ✘

48% Igneous Rocks Rocks have it !

2.5 Appearance

Banded and Foilated

Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Countertops, Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

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

As Building Stone, As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate

Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Cemetery Markers, Creating Artwork

Cemetery Markers

4 Types

4.1 Types

Not Available

Rhyolite

4.2 Features

Is one of the oldest rock, Typically speckled black and white.

Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

4.3.2 Famous Monuments

Not Applicable

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

When alkali feldspar is extracted from granite, it changes to granitoid and later, it becomes trondhjemite with quartz as major mineral.

Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

5.2 Composition

5.2.1 Mineral Content

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Albite, Amphibole, Quartz

5.2.2 Compound Content

NaCl, CaO, MgO, Silicon Dioxide

Al, Fe, Potassium Oxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

97% Igneous Rocks Rocks have it !

✔ ✘

97% Igneous Rocks Rocks have it !

5.3.2 Types of Metamorphism

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

Cataclastic Metamorphism, Regional Metamorphism

5.3.3 Weathering

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99% Igneous Rocks Rocks have it !

✔ ✘

99% Igneous Rocks Rocks have it !

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

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92% Igneous Rocks Rocks have it !

✔ ✘

92% Igneous Rocks Rocks have it !

5.3.6 Types of Erosion

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

Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-7

6.1.2 Grain Size

Medium to Fine Coarse Grained

Medium Grained

6.1.3 Fracture

Conchoidal

Pervasive

6.1.4 Streak

Bluish Black

6.1.5 Porosity

Very Less Porous

Highly Porous

6.1.6 Luster

Subvitreous to Dull

Dull

6.1.7 Compressive Strength

What Is Flint

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▶

▼

Not Available

Rank: N/A (Overall)▶

92.40 N/mm²

Rank: 21 (Overall)▶

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What Is Obsidian

⊕

▶

175 (What Is Grani..)

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6.1.8 Cleavage

Not Available

6.1.9 Toughness

2.1

6.1.10 Specific Gravity

2.86-3

2.38

6.1.11 Transparency

Opaque

6.1.12 Density

2.73 g/cm³

Not Available

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

0.92 kJ/Kg K

Rank: 10 (Overall)▶

Not Available

Rank: N/A (Overall)▶

▲

What Is Granulite

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▶

1.09 (What Is Trave..)

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6.2.2 Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Not Yet Found

China

7.1.2 Africa

Egypt

East Africa

7.1.3 Europe

Finland, Germany, Italy, Romania, Sweden, Turkey

Italy

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

USA

Not Yet Found

7.2.2 South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru

Not Yet Found

7.3 Deposits in Oceania Continent

7.3.1 Australia

New Zealand, South Australia, Western Australia

Queensland

All about Trondhjemite and Comendite Properties

Know all about Trondhjemite and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Trondhjemite and Comendite belong to Igneous Rocks.Texture of Trondhjemite is Phaneritic whereas that of Comendite is Porphyritic. Trondhjemite appears Banded and Foilated and Comendite appears Foliated. The luster of Trondhjemite is subvitreous to dull while that of Comendite is dull. Trondhjemite is available in black, brown, light to dark grey, white colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Trondhjemite and Comendite are cemetery markers, creating artwork.