Limestone and Obsidian Definition

Definition of Limestone and Obsidian

The general Limestone and Obsidian definition can be stated as: Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate. 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 Limestone and Obsidian, get to know about Properties of Limestone and Obsidian. Get to know more information about Limestone and Obsidian origin and discoverer, etymology and class.

History of Limestone and Obsidian

The history of Limestone 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.

Limestone and Obsidian Origin and Discoverer

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

Etymology of Limestone and Obsidian

Along with Limestone and Obsidian definition, know more about the etymology of Limestone and Obsidian. Etymology of Limestone and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Limestone and Formation of Obsidian. The etymology of Limestone is From lime and stone in late 14th Century while that of Obsidian is From lime and stone in late 14th Century. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Limestone belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Limestone and Obsidian are listed below.

For Limestone,

• Sub-class: Durable Rock and Medium Hardness 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