Obsidian and Anorthosite Definition

Definition of Obsidian and Anorthosite

The general Obsidian and Anorthosite 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, Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase. Along with definition of Obsidian and Anorthosite, get to know about Properties of Obsidian and Anorthosite. Get to know more information about Obsidian and Anorthosite origin and discoverer, etymology and class.

History of Obsidian and Anorthosite

The history of Obsidian and Anorthosite 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 Anorthosite Origin and Discoverer

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

Etymology of Obsidian and Anorthosite

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

For Obsidian,

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

For Anorthosite,

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