Diamictite and Dacite
Definition
Definition
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
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
History
Origin
Southern Mongolia
Romania and Moldova, Europe
Discoverer
Unknown
Unknown
Etymology
From Greek dia through and meiktós or mixed
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
Not Applicable
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Texture
Texture
Clastic
Aphanitic to Porphyritic
Color
Brown, Buff
Bluish - Grey, Brown, Grey, Light to Dark Grey
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
No
No
Scratch Resistant
No
No
Stain Resistant
No
No
Wind Resistant
No
No
Acid Resistant
No
No
Appearance
Banded
Vesicular
Uses
Architecture
Interior Uses
Decorative Aggregates, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration
Exterior Uses
As Building Stone, Paving Stone
As Building Stone, Paving Stone, Garden Decoration
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping, Roadstone
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts
Artifacts
Other Uses
Commercial Uses
Commemorative Tablets, Creating Artwork, Production of Lime
Commemorative Tablets, Creating Artwork
Types
Types
Bedded Diamictite and Laminated Diamictite
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite
Features
Host Rock for Lead, Is one of the oldest rock
Host Rock for Lead, Is one of the oldest rock
Archaeological Significance
Monuments
Not Yet Used
Not Yet Used
Famous Monuments
Not Applicable
Not Applicable
Sculpture
Not Yet Used
Not Yet Used
Famous Sculptures
Not Applicable
Not Applicable
Pictographs
Used
Used
Petroglyphs
Used
Used
Figurines
Not Yet Used
Not Yet Used
Fossils
Present
Absent
Formation
Formation
Diamictite is unevenly sorted terrigenous, non-calcareous sedimentary rock which forms due to weathering of mudstone and sandstone.
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.
Composition
Mineral Content
Calcite, Clay, Feldspar, Micas, Quartz
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
Compound Content
Not Available
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide
Transformation
Metamorphism
No
Yes
Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism
Weathering
Yes
Yes
Types of Weathering
Biological Weathering, Chemical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Erosion
Yes
Yes
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion
Chemical Erosion
Properties
Physical Properties
Hardness
2-3
2-2.25
Grain Size
Coarse Grained
Medium to Fine Coarse Grained
Fracture
Conchoidal to Uneven
Conchoidal
Streak
Light to dark brown
White
Porosity
Highly Porous
Less Porous
Luster
Grainy, Pearly and Vitreous
Subvitreous to Dull
Cleavage
Not Available
Perfect
Toughness
Not Available
Not Available
Specific Gravity
4.3-5.0
2.86-2.87
Transparency
Opaque
Translucent
Density
2.2-2.35 g/cm3
2.77-2.771 g/cm3
Thermal Properties
Specific Heat Capacity
0.75 kJ/Kg K
18
0.92 kJ/Kg K
10
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Reserves
Deposits in Eastern Continents
Asia
China, India, Kazakhstan, Mongolia, Russia
Not Yet Found
Africa
Namibia, Nigeria, South Africa
Not Yet Found
Europe
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
France, Greece, Romania, Scotland, Spain
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, USA
USA
South America
Brazil, Venezuela
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Deposits in Oceania Continent
Australia
New South Wales, New Zealand
New Zealand, South Australia, Western Australia
All about Diamictite and Dacite Properties
Know all about Diamictite and Dacite properties here. All properties of rocks are important as they define the type of rock and its application. Diamictite belongs to Sedimentary Rocks while Dacite belongs to Igneous Rocks.Texture of Diamictite is Clastic whereas that of Dacite is Aphanitic to Porphyritic. Diamictite appears Banded and Dacite appears Vesicular. The luster of Diamictite is grainy, pearly and vitreous while that of Dacite is subvitreous to dull. Diamictite is available in brown, buff colors whereas Dacite is available in bluish - grey, brown, grey, light to dark grey colors. The commercial uses of Diamictite and Dacite are commemorative tablets, creating artwork, production of lime.
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