Definition
Origin
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Water Resistant
Scratch Resistant
Stain Resistant
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Metamorphism
Types of Metamorphism
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Types of Weathering
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Asia
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Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
from French néphéline, from Greek nephelē
Fine Grained Rock, Opaque Rock
Black, Brown, Green, Grey, White
Decorative Aggregates, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
Artifacts, Monuments, Sculpture, Small Figurines
Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
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.
Clinopyroxene, Nepheline, Plagioclase
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Water Erosion, Wind Erosion
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock
Beige, Black, Brown, Grey, Pink, White
Dull, Vesicular and Foilated
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration
As Building Stone, Garden Decoration, Office Buildings, Paving Stone
Building houses or walls, Construction Aggregate
Artifacts, Monuments, Sculpture, Small Figurines
Cemetery Markers, Commemorative Tablets, Creating Artwork
Always found as volcanic pipes over deep continental crust
Ignimbrites are formed from very poorly sorted mixture of volcanic ash or tuff and pumice lapilli, commonly with scattered lithic fragments.
Apatite, Biotite, Calcite, Chlorite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz
Burial Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering
Chemical Erosion, Coastal Erosion
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen
Cameroon, Cape Verde, Chad, Djibouti, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Tanzania, Uganda
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom
Antarctica, Hawaii Islands
Canada, Costa Rica, Panama, USA
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador
Central Australia, Western Australia