Sandstone and Obsidian Definition

Definition of Sandstone and Obsidian

The general Sandstone and Obsidian definition can be stated as: Sandstone is defined as a rock which is composed of sand-sized grains of various minerals mostly of uniform size and often are smooth and rounded. 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 Sandstone and Obsidian, get to know about Properties of Sandstone and Obsidian. Get to know more information about Sandstone and Obsidian origin and discoverer, etymology and class.

History of Sandstone and Obsidian

The history of Sandstone 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.

Sandstone and Obsidian Origin and Discoverer

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

Etymology of Sandstone and Obsidian

Along with Sandstone and Obsidian definition, know more about the etymology of Sandstone and Obsidian. Etymology of Sandstone and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Sandstone and Formation of Obsidian. The etymology of Sandstone is From its composition, sand and stone while that of Obsidian is From its composition, sand and stone. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Sandstone belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Sandstone and Obsidian are listed below.

For Sandstone,

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

For Obsidian,

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