Schist and Obsidian Definition

Definition of Schist and Obsidian

The general Schist and Obsidian definition can be stated as: Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation. 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 Schist and Obsidian, get to know about Properties of Schist and Obsidian. Get to know more information about Schist and Obsidian origin and discoverer, etymology and class.

History of Schist and Obsidian

The history of Schist 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.

Schist and Obsidian Origin and Discoverer

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

Etymology of Schist and Obsidian

Along with Schist and Obsidian definition, know more about the etymology of Schist and Obsidian. Etymology of Schist and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Schist and Formation of Obsidian. The etymology of Schist is From French schiste, Greek skhistos i.e. split while that of Obsidian is From French schiste, Greek skhistos i.e. split. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Schist belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Schist and Obsidian are listed below.

For Schist,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• 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