Obsidian and Sandstone Definition

Definition of Obsidian and Sandstone

The general Obsidian and Sandstone 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, 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. Along with definition of Obsidian and Sandstone, get to know about Properties of Obsidian and Sandstone. Get to know more information about Obsidian and Sandstone origin and discoverer, etymology and class.

History of Obsidian and Sandstone

The history of Obsidian and Sandstone 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 Sandstone Origin and Discoverer

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

Etymology of Obsidian and Sandstone

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

For Obsidian,

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

For Sandstone,

• Sub-class: Durable Rock and Hard Rock
• Group:
• Other Categories: Coarse grained rock, Fine grained rock and Opaque rock