Siltstone and Obsidian Definition

Definition of Siltstone and Obsidian

The general Siltstone and Obsidian definition can be stated as: Siltstone can be defined as a fine-grained sedimentary rock which mainly consists of consolidated silt. 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 Siltstone and Obsidian, get to know about Properties of Siltstone and Obsidian. Get to know more information about Siltstone and Obsidian origin and discoverer, etymology and class.

History of Siltstone and Obsidian

The history of Siltstone 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.

Siltstone and Obsidian Origin and Discoverer

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

Etymology of Siltstone and Obsidian

Along with Siltstone and Obsidian definition, know more about the etymology of Siltstone and Obsidian. Etymology of Siltstone and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Siltstone and Formation of Obsidian. The etymology of Siltstone is From English word silt and stone and from Proto-Indo-European root sal and stainaz while that of Obsidian is From English word silt and stone and from Proto-Indo-European root sal and stainaz. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Siltstone belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Siltstone and Obsidian are listed below.

For Siltstone,

• Sub-class: Durable Rock and Hard 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