Gneiss and Tuff Definition

Definition of Gneiss and Tuff

The general Gneiss and Tuff definition can be stated as: Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. On the other hand, Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Along with definition of Gneiss and Tuff, get to know about Properties of Gneiss and Tuff. Get to know more information about Gneiss and Tuff origin and discoverer, etymology and class.

History of Gneiss and Tuff

The history of Gneiss and Tuff 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.

Gneiss and Tuff Origin and Discoverer

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

Etymology of Gneiss and Tuff

Along with Gneiss and Tuff definition, know more about the etymology of Gneiss and Tuff. Etymology of Gneiss and Tuff gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Tuff. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Tuff is From the Middle High German verb gneist (to spark; so called because the rock glitters). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Gneiss belongs to Metamorphic Rocks while Tuff belongs to Igneous Rocks. The sub-class, group and other categories of Gneiss and Tuff are listed below.

For Gneiss,

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

For Tuff,

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