Dacite

Diamictite

Dacite and Diamictite

Dacite

Diamictite

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Definition

Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

Diamictite is a sedimentary rock that consists of non-sorted to poorly sorted terrigenous sediment containing particles that range in size from clay to boulders, suspended in a matrix of mudstone or sandstone

History

Origin

Romania and Moldova, Europe

Southern Mongolia

Discoverer

Unknown

Etymology

From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described

From Greek dia through and meiktós or mixed

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Soft Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Clastic

Color

Bluish - Grey, Brown, Grey, Light to Dark Grey

Brown, Buff

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Vesicular

Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, Paving Stone, Garden Decoration

As Building Stone, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

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

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

Medical Industry

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork

Commemorative Tablets, Creating Artwork, Production of Lime

Types

Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Bedded Diamictite and Laminated Diamictite

Features

Host Rock for Lead, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Further, the Oceanic crust is hydrothermally altered as quartz and sodium are added.

Diamictite is unevenly sorted terrigenous, non-calcareous sedimentary rock which forms due to weathering of mudstone and sandstone.

Composition

Mineral Content

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

Calcite, Clay, Feldspar, Micas, Quartz

Compound Content

Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Properties

Physical Properties

Hardness

2-2.252-3

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Coarse Grained

Fracture

Conchoidal

Conchoidal to Uneven

Streak

White

Light to dark brown

Porosity

Less Porous

Highly Porous

Luster

Subvitreous to Dull

Grainy, Pearly and Vitreous

Compressive Strength

70.00 N/mm²-

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.86-2.874.3-5.0

0 8.4

👆🏻

Transparency

Translucent

Opaque

Density

2.77-2.771 g/cm³2.2-2.35 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.75 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Kazakhstan, Mongolia, Russia

Africa

Namibia, Nigeria, South Africa

Europe

France, Greece, Romania, Scotland, Spain

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Brazil, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, South Australia, Western Australia

New South Wales, New Zealand

All about Dacite and Diamictite Properties

Know all about Dacite and Diamictite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Diamictite belongs to Sedimentary Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Diamictite is Clastic. Dacite appears Vesicular and Diamictite appears Banded. The luster of Dacite is subvitreous to dull while that of Diamictite is grainy, pearly and vitreous. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Diamictite is available in brown, buff colors. The commercial uses of Dacite are commemorative tablets, creating artwork and that of Diamictite are commemorative tablets, creating artwork, production of lime.