Formation of Mylonite and Dacite

Mylonite

Dacite

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Formation

Mineral Content

Compound Content

Metamorphism

Types of Metamorphism

Weathering

Types of Weathering

Erosion

Types of Erosion

Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.

Porphyroblasts

Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide

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Biological Weathering, Chemical Weathering, Mechanical Weathering

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Chemical Erosion, Sea Erosion, Wind Erosion

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.

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

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

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Burial Metamorphism, Cataclastic Metamorphism

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Biological Weathering, Chemical Weathering, Mechanical Weathering

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Chemical Erosion

Mylonite and Dacite Formation

Formation of rocks is a long process and hence, Mylonite and Dacite formation sounds very interesting. According to the formation, all rocks are divided into :Igneous Rocks, Sedimentary Rocks and Metamorphic Rocks. Igneous rocks form by crystallization of magma or lava. The magma is made up of various components of pre-existing rocks which have been subjected to melting either at subduction zones or within the Earth's mantle. Igneous rocks are generally seen at mid ocean ridges or in intra-plate hotspots. Sedimentary rocks are formed when sediments accumulate gradually. As the sediments are buried they get compacted as more and more material is deposited on top. Eventually the sediments become so dense that they form a rock. Metamorphic rocks are rocks which once existed as igneous or sedimentary rocks but have been subjected to varying degrees of pressure and heat within the Earth's crust. Get to know all about formation of Mylonite and Dacite, composition of Mylonite and Dacite and their transformation.