Formation of Jasperoid and Chert

Jasperoid

Chert

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Formation

Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes and basalts.

Chert forms when microcrystals of silicon dioxide grow within soft sediments that become limestone or chalk. The chert formation can be either of chemical or biological origin.

Composition

Mineral Content

Clay Minerals, Pyrite, Quartz, Sulfides

Quartz, Silicon

Compound Content

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

Silicon Dioxide

Transformation

Metamorphism

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Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

Weathering

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Types of Weathering

Erosion

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Types of Erosion

Chemical Erosion

Jasperoid and Chert Formation

Formation of rocks is a long process and hence, Jasperoid and Chert 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 Jasperoid and Chert, composition of Jasperoid and Chert and their transformation.