Gneiss and Trachyandesite Definition

Definition of Gneiss and Trachyandesite

The general Gneiss and Trachyandesite 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, Trachyandesite is an extrusive igneous rock.. Along with definition of Gneiss and Trachyandesite, get to know about Properties of Gneiss and Trachyandesite. Get to know more information about Gneiss and Trachyandesite origin and discoverer, etymology and class.

History of Gneiss and Trachyandesite

The history of Gneiss and Trachyandesite 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 Trachyandesite Origin and Discoverer

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

Etymology of Gneiss and Trachyandesite

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

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