Formation of Claystone and Oil shale

Claystone

Oil shale

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1 Formation

1.1 Formation

Claystone is generally quite soft, but can be hard and brittle. It forms due to weathering of mudstone.

Oil Shale forms on the beds of seas and lakes and its formation starts with the organic debris settling and accumulating at the bottom of a lake or sea which are then transformed into rock with the help of high temperature and pressure.

1.4 Composition

1.4.1 Mineral Content

Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz

Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides

1.4.2 Compound Content

Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, MgO, Silicon Dioxide

Ca, Fe, Mg, Silicon Dioxide, Sodium

1.5 Transformation

1.5.1 Metamorphism

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1.5.2 Types of Metamorphism

Not Applicable

1.5.3 Weathering

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1.5.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

1.5.5 Erosion

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1.5.6 Types of Erosion

Coastal Erosion, Water Erosion

Chemical Erosion, Sea Erosion, Water Erosion

Claystone and Oil shale Formation

Formation of rocks is a long process and hence, Claystone and Oil shale 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 Claystone and Oil shale, composition of Claystone and Oil shale and their transformation.