Greywacke and Rhyolite Definition

Definition of Greywacke and Rhyolite

The general Greywacke and Rhyolite definition can be stated as: Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay. On the other hand, Rhyolite is a fine-grained igneous rock which is rich in silica. Along with definition of Greywacke and Rhyolite, get to know about Properties of Greywacke and Rhyolite. Get to know more information about Greywacke and Rhyolite origin and discoverer, etymology and class.

History of Greywacke and Rhyolite

The history of Greywacke and Rhyolite 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.

Greywacke and Rhyolite Origin and Discoverer

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

Etymology of Greywacke and Rhyolite

Along with Greywacke and Rhyolite definition, know more about the etymology of Greywacke and Rhyolite. Etymology of Greywacke and Rhyolite gives information about origin and formation of a particular rock. Know more about Formation of Greywacke and Formation of Rhyolite. The etymology of Greywacke is From German Grauwacke, from grau grey + wacke while that of Rhyolite is From German Grauwacke, from grau grey + wacke. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Greywacke belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks. The sub-class, group and other categories of Greywacke and Rhyolite are listed below.

For Greywacke,

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

For Rhyolite,

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