Obsidian and Marl Definition

Definition of Obsidian and Marl

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

History of Obsidian and Marl

The history of Obsidian and Marl 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 Marl Origin and Discoverer

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

Etymology of Obsidian and Marl

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

For Obsidian,

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

For Marl,

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