Formation of Anorthosite and Chalk

Anorthosite

Chalk

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Formation

Mineral Content

Compound Content

Metamorphism

Types of Metamorphism

Weathering

Types of Weathering

Erosion

Types of Erosion

Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide

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Cataclastic Metamorphism, Contact Metamorphism

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Biological Weathering

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Chemical Erosion, Wind Erosion

Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.

Calcite, Clay, Clay Minerals, Quartz, Sand

Ca, NaCl, CaO

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Biological Weathering, Chemical Weathering

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Chemical Erosion, Coastal Erosion, Water Erosion

Anorthosite and Chalk Formation

Formation of rocks is a long process and hence, Anorthosite and Chalk 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 Anorthosite and Chalk, composition of Anorthosite and Chalk and their transformation.