Obsidian and Granulite Definition

Definition of Obsidian and Granulite

The general Obsidian and Granulite 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, Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.. Along with definition of Obsidian and Granulite, get to know about Properties of Obsidian and Granulite. Get to know more information about Obsidian and Granulite origin and discoverer, etymology and class.

History of Obsidian and Granulite

The history of Obsidian and Granulite 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 Granulite Origin and Discoverer

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

Etymology of Obsidian and Granulite

Along with Obsidian and Granulite definition, know more about the etymology of Obsidian and Granulite. Etymology of Obsidian and Granulite gives information about origin and formation of a particular rock. Know more about Formation of Obsidian and Formation of Granulite. The etymology of Obsidian is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius while that of Granulite 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 belongs to Igneous Rocks while Granulite belongs to Metamorphic Rocks. The sub-class, group and other categories of Obsidian and Granulite are listed below.

For Obsidian,

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

For Granulite,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock