Obsidian and Schist Definition

Definition of Obsidian and Schist

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

History of Obsidian and Schist

The history of Obsidian and Schist 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 Schist Origin and Discoverer

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

Etymology of Obsidian and Schist

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

For Obsidian,

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

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