Formation of Marble and Chalk

Marble

Chalk

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1 Formation

1.1 Formation

Marble is a metamorphic rock produced from limestone in the earth crust. It is formed by the metamorphism of limestone.

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

1.2 Composition

1.2.1 Mineral Content

Garnet, Graphite, Olivine, Pyrite, Quartz

Calcite, Clay, Clay Minerals, Quartz, Sand

1.2.2 Compound Content

CaO, Iron(III) Oxide, FeO, MgO, Silicon Dioxide

Ca, NaCl, CaO

1.3 Transformation

1.3.1 Metamorphism

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1.3.2 Types of Metamorphism

Impact Metamorphism

Not Applicable

1.3.3 Weathering

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1.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering

1.3.5 Erosion

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1.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Marble and Chalk Formation

Formation of rocks is a long process and hence, Marble and Chalk formation sounds very interesting. According to the formation, all rocks are divided into :Igneous Rocks, Fossil 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 Marble and Chalk, composition of Marble and Chalk and their transformation.