Gneiss and Adamellite Definition

Definition of Gneiss and Adamellite

The general Gneiss and Adamellite 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, Adamellite is a coarse-grained porphyritic igneous rock, a variety of Monzogranite and dominated by phenocrysts of orthoclase in a granular groundmass of perthite, plagioclase and quartz. Along with definition of Gneiss and Adamellite, get to know about Properties of Gneiss and Adamellite. Get to know more information about Gneiss and Adamellite origin and discoverer, etymology and class.

History of Gneiss and Adamellite

The history of Gneiss and Adamellite 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 Adamellite Origin and Discoverer

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

Etymology of Gneiss and Adamellite

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

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