Formation of Oolite and Lignite

Oolite

Lignite

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Formation

Mineral Content

Compound Content

Metamorphism

Types of Metamorphism

Weathering

Types of Weathering

Erosion

Types of Erosion

Oolites form when layers of calcite are deposited around a sand grain or fossil piece and are rolled around in calm water, which makes them round.

Calcite, Chert, Clay, Dolomite, Quartz, Sand, Silt

Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, FeO, MgO

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Biological Weathering, Chemical Weathering, Mechanical Weathering

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Chemical Erosion, Coastal Erosion

Coal formation takes place due to accumulation of plant debris in a swamp environment. The Coal formation process continues, as peat turns into lignite brown or black coal at increasing heat and pressure.

Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

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Biological Weathering, Chemical Weathering, Mechanical Weathering

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Chemical Erosion, Water Erosion, Wind Erosion

Oolite and Lignite Formation

Formation of rocks is a long process and hence, Oolite and Lignite 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 Oolite and Lignite, composition of Oolite and Lignite and their transformation.