1 Formation
1.1 Formation
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
The banded iron layers are formed in sea water when oxygen is released by photosynthetic cyano-bacteria. The oxygen then combines with dissolved iron in ocean to form insoluble iron oxides, which precipitated out, forming a thin layer of banded iron formation on ocean floor.
1.2 Composition
1.2.1 Mineral Content
Andalusite
Hematite, Magnetite, Quartz
1.2.2 Compound Content
Fe, Mg
Fe, Iron(III) Oxide, Silicon Dioxide
1.3 Transformation
1.3.1 Metamorphism
1.3.2 Types of Metamorphism
Not Applicable
Not Applicable
1.3.3 Weathering
1.3.4 Types of Weathering
Biological Weathering
Chemical Weathering
1.3.5 Erosion
1.3.6 Types of Erosion
Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Coastal Erosion, Wind Erosion