Amphibolite and Obsidian Definition

Definition of Amphibolite and Obsidian

The general Amphibolite and Obsidian definition can be stated as: Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase. 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 Amphibolite and Obsidian, get to know about Properties of Amphibolite and Obsidian. Get to know more information about Amphibolite and Obsidian origin and discoverer, etymology and class.

History of Amphibolite and Obsidian

The history of Amphibolite 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.

Amphibolite and Obsidian Origin and Discoverer

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

Etymology of Amphibolite and Obsidian

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

For Amphibolite,

• Sub-class: Durable Rock and Hard Rock
• Group:
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock

For Obsidian,

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