Marl and Obsidian Definition

Definition of Marl and Obsidian

The general Marl and Obsidian definition can be stated as: Marl is an unconsolidated sedimentary rock consisting of clay and lime. 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 Marl and Obsidian, get to know about Properties of Marl and Obsidian. Get to know more information about Marl and Obsidian origin and discoverer, etymology and class.

History of Marl and Obsidian

The history of Marl 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.

Marl and Obsidian Origin and Discoverer

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

Etymology of Marl and Obsidian

Along with Marl and Obsidian definition, know more about the etymology of Marl and Obsidian. Etymology of Marl and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Marl and Formation of Obsidian. The etymology of Marl is From Old French marle, from Late Latin marglia while that of Obsidian is From Old French marle, from Late Latin marglia. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Marl belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Marl and Obsidian are listed below.

For Marl,

• Sub-class: Durable Rock and Soft Rock
• Group:
• Other Categories: Fine grained rock and Opaque rock

For Obsidian,

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