Obsidian and Pumice Definition

Definition of Obsidian and Pumice

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

History of Obsidian and Pumice

The history of Obsidian and Pumice 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 Pumice Origin and Discoverer

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

Etymology of Obsidian and Pumice

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

For Obsidian,

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

For Pumice,

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