Andesite and Gneiss Definition

Definition of Andesite and Gneiss

The general Andesite and Gneiss definition can be stated as: Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. 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 Andesite and Gneiss, get to know about Properties of Andesite and Gneiss. Get to know more information about Andesite and Gneiss origin and discoverer, etymology and class.

History of Andesite and Gneiss

The history of Andesite 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.

Andesite and Gneiss Origin and Discoverer

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

Etymology of Andesite and Gneiss

Along with Andesite and Gneiss definition, know more about the etymology of Andesite and Gneiss. Etymology of Andesite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Andesite and Formation of Gneiss. The etymology of Andesite is From Andes mountains, where it is found in abundance while that of Gneiss is From Andes mountains, where it is found in abundance. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Andesite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Andesite and Gneiss are listed below.

For Andesite,

• Sub-class: Durable Rock and Hard Rock
• Group: Volcanic
• Other Categories: Fine 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