Obsidian and Theralite Definition

Definition of Obsidian and Theralite

The general Obsidian and Theralite 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, Theralite is a plutonic hylocrystalline igneous rock consisting of augite, olivine, calcic plagioclase and nepheline. Along with definition of Obsidian and Theralite, get to know about Properties of Obsidian and Theralite. Get to know more information about Obsidian and Theralite origin and discoverer, etymology and class.

History of Obsidian and Theralite

The history of Obsidian and Theralite 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 Theralite Origin and Discoverer

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

Etymology of Obsidian and Theralite

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

For Obsidian,

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

For Theralite,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• Other Categories: Fine grained rock and Opaque rock