Gneiss and Theralite Definition

Definition of Gneiss and Theralite

The general Gneiss and Theralite 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, Theralite is a plutonic hylocrystalline igneous rock consisting of augite, olivine, calcic plagioclase and nepheline. Along with definition of Gneiss and Theralite, get to know about Properties of Gneiss and Theralite. Get to know more information about Gneiss and Theralite origin and discoverer, etymology and class.

History of Gneiss and Theralite

The history of Gneiss and Theralite 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 Theralite Origin and Discoverer

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

Etymology of Gneiss and Theralite

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

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