Shoshonite and Obsidian Definition

Definition of Shoshonite and Obsidian

The general Shoshonite and Obsidian definition can be stated as: 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. 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 Shoshonite and Obsidian, get to know about Properties of Shoshonite and Obsidian. Get to know more information about Shoshonite and Obsidian origin and discoverer, etymology and class.

History of Shoshonite and Obsidian

The history of Shoshonite 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.

Shoshonite and Obsidian Origin and Discoverer

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

Etymology of Shoshonite and Obsidian

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

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

For Obsidian,

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