1 Formation
1.1 Formation
Nephelinite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.
1.2 Composition
1.2.1 Mineral Content
Clinopyroxene, Nepheline, Plagioclase
Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz
1.2.2 Compound Content
Ca, CaO, Carbon, Cl, MgO
Potassium Oxide, Sodium Oxide, Silicon Dioxide
1.3 Transformation
1.3.1 Metamorphism
1.3.2 Types of Metamorphism
Contact Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
1.3.3 Weathering
1.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
1.3.5 Erosion
1.3.6 Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion