1 Formation
1.1 Formation
An argillite is a fine-grained sedimentary rock mainly composed of clay particles which forms from lithified muds which contain variable amounts of silt-sized particles.
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.
1.2 Composition
1.2.1 Mineral Content
Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz
Clinopyroxene, Nepheline, Plagioclase
1.2.2 Compound Content
Iron(III) Oxide, Potassium Oxide, MgO, Silicon Dioxide
Ca, CaO, Carbon, Cl, MgO
1.3 Transformation
1.3.1 Metamorphism
1.3.2 Types of Metamorphism
Not Applicable
Contact Metamorphism
1.3.3 Weathering
1.3.4 Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
1.3.5 Erosion
1.3.6 Types of Erosion
Chemical Erosion
Chemical Erosion, Water Erosion, Wind Erosion