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Nepheline Syenite
Nepheline Syenite

Pseudotachylite
Pseudotachylite



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Nepheline Syenite
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Pseudotachylite
Definition

Definition

Origin

Discoverer

Etymology

Class

Sub-Class

Group

Other Categories

 
Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz
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Unknown
From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China
Igneous Rocks
Durable Rock, Medium Hardness Rock
Plutonic
Fine Grained Rock, Opaque Rock
 
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
USA
Unknown
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.
Metamorphic Rocks
Durable Rock, Hard Rock
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Fine Grained Rock, Opaque Rock