Gneiss and Pseudotachylite Definition

Definition of Gneiss and Pseudotachylite

The general Gneiss and Pseudotachylite 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, Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. Along with definition of Gneiss and Pseudotachylite, get to know about Properties of Gneiss and Pseudotachylite. Get to know more information about Gneiss and Pseudotachylite origin and discoverer, etymology and class.

History of Gneiss and Pseudotachylite

The history of Gneiss and Pseudotachylite 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 Pseudotachylite Origin and Discoverer

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

Etymology of Gneiss and Pseudotachylite

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

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock