Gneiss and Amphibolite Definition

Definition of Gneiss and Amphibolite

The general Gneiss and Amphibolite 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, Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase. Along with definition of Gneiss and Amphibolite, get to know about Properties of Gneiss and Amphibolite. Get to know more information about Gneiss and Amphibolite origin and discoverer, etymology and class.

History of Gneiss and Amphibolite

The history of Gneiss and Amphibolite 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 Amphibolite Origin and Discoverer

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

Etymology of Gneiss and Amphibolite

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

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