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Obsidian and Hornblendite Definition


Hornblendite and Obsidian Definition


Definition

Definition
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth   
Hornblendite is a type of igneous plutonic rock consisting mainly of amphibole hornblende and is a type of Amphibolite rock   

History
  
  

Origin
Ethiopia   
Unknown   

Discoverer
Obsius   
Unknown   

Etymology
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius   
From German, Horn horn + blende   

Class
Igneous Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Medium Hardness Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Volcanic   
Plutonic   

Other Categories
Opaque Rock   
Coarse Grained Rock, Medium Grained Rock, Opaque Rock   

Texture >>
<< Summary

Definition of Obsidian and Hornblendite

The general Obsidian and Hornblendite definition can be stated as: Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. On the other hand, Hornblendite is a type of igneous plutonic rock consisting mainly of amphibole hornblende and is a type of Amphibolite rock. Along with definition of Obsidian and Hornblendite, get to know about Properties of Obsidian and Hornblendite. Get to know more information about Obsidian and Hornblendite origin and discoverer, etymology and class.

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History of Obsidian and Hornblendite

The history of Obsidian and Hornblendite 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.

Obsidian and Hornblendite Origin and Discoverer

Obsidian and Hornblendite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Obsidian and Hornblendite. In this section, you will know about Obsidian and Hornblendite Origin and Discoverer. Origin of Obsidian is Ethiopia whereas Origin of Hornblendite is Unknown. It is interesting to know the name of Obsidian and Hornblendite discoverer. The Discoverer of Obsidian is Obsius and the discoverer of Hornblendite is Unknown.

Etymology of Obsidian and Hornblendite

Along with Obsidian and Hornblendite definition, know more about the etymology of Obsidian and Hornblendite. Etymology of Obsidian and Hornblendite gives information about origin and formation of a particular rock. Know more about Formation of Obsidian and Formation of Hornblendite. The etymology of Obsidian is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius while that of Hornblendite is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Obsidian and Hornblendite belong to Igneous Rocks. The sub-class, group and other categories of Obsidian and Hornblendite are listed below.

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For Hornblendite,

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