Gneiss and Troctolite Definition

Definition of Gneiss and Troctolite

The general Gneiss and Troctolite 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, Troctolite is a mafic intrusive rock type. It consists essentially of major but variable amounts of olivine and calcic plagioclase along with minor pyroxene. It is an olivine-rich anorthosite, or a pyroxene-depleted relative of gabbro. Along with definition of Gneiss and Troctolite, get to know about Properties of Gneiss and Troctolite. Get to know more information about Gneiss and Troctolite origin and discoverer, etymology and class.

History of Gneiss and Troctolite

The history of Gneiss and Troctolite 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 Troctolite Origin and Discoverer

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

Etymology of Gneiss and Troctolite

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

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