Anorthosite and Obsidian Definition

Definition of Anorthosite and Obsidian

The general Anorthosite and Obsidian definition can be stated as: Anorthosite is a granular igneous rock composed largely of labradorite or 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 Anorthosite and Obsidian, get to know about Properties of Anorthosite and Obsidian. Get to know more information about Anorthosite and Obsidian origin and discoverer, etymology and class.

History of Anorthosite and Obsidian

The history of Anorthosite 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.

Anorthosite and Obsidian Origin and Discoverer

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

Etymology of Anorthosite and Obsidian

Along with Anorthosite and Obsidian definition, know more about the etymology of Anorthosite and Obsidian. Etymology of Anorthosite and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Anorthosite and Formation of Obsidian. The etymology of Anorthosite is From French anorthose plagioclase + -ite1 while that of Obsidian is From French anorthose plagioclase + -ite1. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Anorthosite and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Anorthosite and Obsidian are listed below.

For Anorthosite,

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

For Obsidian,

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