Chert and Obsidian Definition

Definition of Chert and Obsidian

The general Chert and Obsidian definition can be stated as: Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture. 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 Chert and Obsidian, get to know about Properties of Chert and Obsidian. Get to know more information about Chert and Obsidian origin and discoverer, etymology and class.

History of Chert and Obsidian

The history of Chert 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.

Chert and Obsidian Origin and Discoverer

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

Etymology of Chert and Obsidian

Along with Chert and Obsidian definition, know more about the etymology of Chert and Obsidian. Etymology of Chert and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Chert and Formation of Obsidian. The etymology of Chert is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use while that of Obsidian is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chert belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Chert and Obsidian are listed below.

For Chert,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock

For Obsidian,

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