Gneiss and Dacite Definition

Definition of Gneiss and Dacite

The general Gneiss and Dacite 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, Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. Along with definition of Gneiss and Dacite, get to know about Properties of Gneiss and Dacite. Get to know more information about Gneiss and Dacite origin and discoverer, etymology and class.

History of Gneiss and Dacite

The history of Gneiss and Dacite 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 Dacite Origin and Discoverer

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

Etymology of Gneiss and Dacite

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

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