1 Formation
1.1 Formation
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.
Basanite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes.
1.2 Composition
1.2.1 Mineral Content
Hematite, Magnetite, Quartz
Augite, Feldspar, Ilmenite, Olivine, Plagioclase
1.2.2 Compound Content
Fe, Iron(III) Oxide, Silicon Dioxide
Potassium Oxide, Sodium Oxide, Silicon Dioxide
1.3 Transformation
1.3.1 Metamorphism
1.3.2 Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
1.3.3 Weathering
1.3.4 Types of Weathering
Chemical Weathering
Chemical Weathering, Mechanical Weathering
1.3.5 Erosion
1.3.6 Types of Erosion
Coastal Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion