Gneiss and Rhyolite Definition

Definition of Gneiss and Rhyolite

The general Gneiss and Rhyolite 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, Rhyolite is a fine-grained igneous rock which is rich in silica. Along with definition of Gneiss and Rhyolite, get to know about Properties of Gneiss and Rhyolite. Get to know more information about Gneiss and Rhyolite origin and discoverer, etymology and class.

History of Gneiss and Rhyolite

The history of Gneiss and Rhyolite 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 Rhyolite Origin and Discoverer

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

Etymology of Gneiss and Rhyolite

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

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