Gneiss and Tachylite Definition

Definition of Gneiss and Tachylite

The general Gneiss and Tachylite 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, Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt. Along with definition of Gneiss and Tachylite, get to know about Properties of Gneiss and Tachylite. Get to know more information about Gneiss and Tachylite origin and discoverer, etymology and class.

History of Gneiss and Tachylite

The history of Gneiss and Tachylite 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 Tachylite Origin and Discoverer

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

Etymology of Gneiss and Tachylite

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

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