Scoria and Obsidian Definition

Definition of Scoria and Obsidian

The general Scoria and Obsidian definition can be stated as: Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities. 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 Scoria and Obsidian, get to know about Properties of Scoria and Obsidian. Get to know more information about Scoria and Obsidian origin and discoverer, etymology and class.

History of Scoria and Obsidian

The history of Scoria 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.

Scoria and Obsidian Origin and Discoverer

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

Etymology of Scoria and Obsidian

Along with Scoria and Obsidian definition, know more about the etymology of Scoria and Obsidian. Etymology of Scoria and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Scoria and Formation of Obsidian. The etymology of Scoria is From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung while that of Obsidian is From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Scoria and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Scoria and Obsidian are listed below.

For Scoria,

• 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