Gneiss and Comendite Definition

Definition of Gneiss and Comendite

The general Gneiss and Comendite 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, Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite. Along with definition of Gneiss and Comendite, get to know about Properties of Gneiss and Comendite. Get to know more information about Gneiss and Comendite origin and discoverer, etymology and class.

History of Gneiss and Comendite

The history of Gneiss and Comendite 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 Comendite Origin and Discoverer

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

Etymology of Gneiss and Comendite

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

For Gneiss,

• Sub-class: Durable Rock and Hard Rock
• Group:
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock

For Comendite,

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