Pumice and Obsidian Definition

Definition of Pumice and Obsidian

The general Pumice and Obsidian definition can be stated as: Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. 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 Pumice and Obsidian, get to know about Properties of Pumice and Obsidian. Get to know more information about Pumice and Obsidian origin and discoverer, etymology and class.

History of Pumice and Obsidian

The history of Pumice 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.

Pumice and Obsidian Origin and Discoverer

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

Etymology of Pumice and Obsidian

Along with Pumice and Obsidian definition, know more about the etymology of Pumice and Obsidian. Etymology of Pumice and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Pumice and Formation of Obsidian. The etymology of Pumice is From Old French pomis, from a Latin dialect variant of pumex while that of Obsidian is From Old French pomis, from a Latin dialect variant of pumex. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Pumice and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Pumice and Obsidian are listed below.

For Pumice,

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

For Obsidian,

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