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Adakite
Adakite

Obsidian
Obsidian



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Adakite and Obsidian Definition

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1 Definition
1.1 Definition
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs
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
1.2 History
1.2.1 Origin
Adak, Aleutian Islands
Ethiopia
1.2.2 Discoverer
Defant and Drummond
Obsius
1.3 Etymology
From Adak, Aleutian Islands
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Volcanic
Volcanic
1.6 Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock

Definition of Adakite and Obsidian

The general Adakite and Obsidian definition can be stated as: Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs. On the other hand, 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. Along with definition of Adakite and Obsidian, get to know about Properties of Adakite and Obsidian. Get to know more information about Adakite and Obsidian origin and discoverer, etymology and class.

History of Adakite and Obsidian

The history of Adakite and Obsidian 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.

Adakite and Obsidian Origin and Discoverer

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

Etymology of Adakite and Obsidian

Along with Adakite and Obsidian definition, know more about the etymology of Adakite and Obsidian. Etymology of Adakite and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Adakite and Formation of Obsidian. The etymology of Adakite is From Adak, Aleutian Islands while that of Obsidian is From Adak, Aleutian Islands. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Adakite and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Adakite and Obsidian are listed below.

For Adakite,

  • Sub-class: Durable Rock and Medium Hardness Rock
  • Group: Volcanic
  • Other Categories: Fine grained rock, Medium grained rock and Opaque rock

For Obsidian,

  • Sub-class: Durable Rock and Medium Hardness Rock
  • Group: Volcanic
  • Other Categories: Opaque rock
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