Formation of Schist and Oolite

Schist

Oolite

Add ⊕

1 Formation

1.1 Formation

Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

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.

1.2 Composition

1.2.1 Mineral Content

Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc

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

1.2.2 Compound Content

CaO, Carbon Dioxide, MgO

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

1.3 Transformation

1.3.1 Metamorphism

✔ ✘

50% Metamorphic Rocks Rocks have it !

✔ ✘

19% Sedimentary Rocks Rocks have it !

1.3.2 Types of Metamorphism

Not Applicable

1.3.3 Weathering

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

78% Sedimentary Rocks Rocks have it !

1.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

1.3.5 Erosion

✔ ✘

77% Metamorphic Rocks Rocks have it !

✔ ✘

86% Sedimentary Rocks Rocks have it !

1.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Coastal Erosion

Schist and Oolite Formation

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