Coquina and Obsidian Definition

Definition of Coquina and Obsidian

The general Coquina and Obsidian definition can be stated as: Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or other invertebrates. 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 Coquina and Obsidian, get to know about Properties of Coquina and Obsidian. Get to know more information about Coquina and Obsidian origin and discoverer, etymology and class.

History of Coquina and Obsidian

The history of Coquina 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.

Coquina and Obsidian Origin and Discoverer

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

Etymology of Coquina and Obsidian

Along with Coquina and Obsidian definition, know more about the etymology of Coquina and Obsidian. Etymology of Coquina and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Coquina and Formation of Obsidian. The etymology of Coquina is From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century) while that of Obsidian is From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Coquina belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Coquina and Obsidian are listed below.

For Coquina,

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

For Obsidian,

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