Gneiss and Trachyte Definition

Definition of Gneiss and Trachyte

The general Gneiss and Trachyte 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, Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar. Along with definition of Gneiss and Trachyte, get to know about Properties of Gneiss and Trachyte. Get to know more information about Gneiss and Trachyte origin and discoverer, etymology and class.

History of Gneiss and Trachyte

The history of Gneiss and Trachyte 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 Trachyte Origin and Discoverer

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

Etymology of Gneiss and Trachyte

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

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