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Pseudotachylite and Rapakivi Granite Definition


Rapakivi Granite and Pseudotachylite Definition


Definition

Definition
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.   
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase   

History
  
  

Origin
USA   
Finland, Europe   

Discoverer
Unknown   
Jakob Sederholm   

Etymology
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.   
From Finnish Rapakivi which stands for crumbly rock   

Class
Metamorphic Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Not Applicable   
Plutonic   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Opaque Rock   

Texture >>
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Definition of Pseudotachylite and Rapakivi Granite

The general Pseudotachylite and Rapakivi Granite definition can be stated as: Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. On the other hand, Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Along with definition of Pseudotachylite and Rapakivi Granite, get to know about Properties of Pseudotachylite and Rapakivi Granite. Get to know more information about Pseudotachylite and Rapakivi Granite origin and discoverer, etymology and class.

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History of Pseudotachylite and Rapakivi Granite

The history of Pseudotachylite and Rapakivi Granite gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Pseudotachylite and Rapakivi Granite Origin and Discoverer

Pseudotachylite and Rapakivi Granite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Pseudotachylite and Rapakivi Granite. In this section, you will know about Pseudotachylite and Rapakivi Granite Origin and Discoverer. Origin of Pseudotachylite is USA whereas Origin of Rapakivi Granite is Finland, Europe. It is interesting to know the name of Pseudotachylite and Rapakivi Granite discoverer. The Discoverer of Pseudotachylite is Unknown and the discoverer of Rapakivi Granite is Jakob Sederholm.

Etymology of Pseudotachylite and Rapakivi Granite

Along with Pseudotachylite and Rapakivi Granite definition, know more about the etymology of Pseudotachylite and Rapakivi Granite. Etymology of Pseudotachylite and Rapakivi Granite gives information about origin and formation of a particular rock. Know more about Formation of Pseudotachylite and Formation of Rapakivi Granite. The etymology of Pseudotachylite is From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults. while that of Rapakivi Granite is From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Pseudotachylite belongs to Metamorphic Rocks while Rapakivi Granite belongs to Igneous Rocks. The sub-class, group and other categories of Pseudotachylite and Rapakivi Granite are listed below.

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