Obsidian and Tuff Definition

Definition of Obsidian and Tuff

The general Obsidian and Tuff 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, Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Along with definition of Obsidian and Tuff, get to know about Properties of Obsidian and Tuff. Get to know more information about Obsidian and Tuff origin and discoverer, etymology and class.

History of Obsidian and Tuff

The history of Obsidian and Tuff 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 Tuff Origin and Discoverer

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

Etymology of Obsidian and Tuff

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

For Obsidian,

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

For Tuff,

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