Formation of Porphyry and Dolomite

Porphyry

Dolomite

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Formation

Mineral Content

Compound Content

Metamorphism

Types of Metamorphism

Weathering

Types of Weathering

Erosion

Types of Erosion

Porphyry is formed in two stages: the magma cools slowly deep within the crust or the magma is cools rapidly as it erupts from a volcano, creating small grains that are usually invisible to naked eye.

Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica

Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide

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

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Biological Weathering, Chemical Weathering

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Chemical Erosion, Coastal Erosion, Glacier Erosion

Dolomite rocks are originally deposited as calcite or aragonite rich limestone, but during diagenesis process, the calcite or aragonite is transformed into dolomite.

Clay Minerals, Pyrite, Quartz, Sulfides

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

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Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

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Porphyry and Dolomite Formation

Formation of rocks is a long process and hence, Porphyry and Dolomite 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 Porphyry and Dolomite, composition of Porphyry and Dolomite and their transformation.