Obsidian and Shoshonite Definition

Definition of Obsidian and Shoshonite

The general Obsidian and Shoshonite 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, Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass. Along with definition of Obsidian and Shoshonite, get to know about Properties of Obsidian and Shoshonite. Get to know more information about Obsidian and Shoshonite origin and discoverer, etymology and class.

History of Obsidian and Shoshonite

The history of Obsidian and Shoshonite 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 Shoshonite Origin and Discoverer

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

Etymology of Obsidian and Shoshonite

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

For Obsidian,

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

For Shoshonite,

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