Tephrite and Gneiss Definition

Definition of Tephrite and Gneiss

The general Tephrite and Gneiss definition can be stated as: Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock. On the other hand, 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. Along with definition of Tephrite and Gneiss, get to know about Properties of Tephrite and Gneiss. Get to know more information about Tephrite and Gneiss origin and discoverer, etymology and class.

History of Tephrite and Gneiss

The history of Tephrite and Gneiss 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.

Tephrite and Gneiss Origin and Discoverer

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

Etymology of Tephrite and Gneiss

Along with Tephrite and Gneiss definition, know more about the etymology of Tephrite and Gneiss. Etymology of Tephrite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Tephrite and Formation of Gneiss. The etymology of Tephrite is From Greek tephra, ashes from Indo-European base, to burn while that of Gneiss is From Greek tephra, ashes from Indo-European base, to burn. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Tephrite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Tephrite and Gneiss are listed below.

For Tephrite,

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

For Gneiss,

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