Norite and Obsidian Definition

Definition of Norite and Obsidian

The general Norite and Obsidian definition can be stated as: Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine. 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 Norite and Obsidian, get to know about Properties of Norite and Obsidian. Get to know more information about Norite and Obsidian origin and discoverer, etymology and class.

History of Norite and Obsidian

The history of Norite 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.

Norite and Obsidian Origin and Discoverer

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

Etymology of Norite and Obsidian

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

For Norite,

• Sub-class: Durable Rock and Hard 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