Obsidian and Limestone Definition

Definition of Obsidian and Limestone

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

History of Obsidian and Limestone

The history of Obsidian and Limestone 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 Limestone Origin and Discoverer

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

Etymology of Obsidian and Limestone

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

For Obsidian,

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

For Limestone,

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