Greywacke and Variolite Definition

Definition of Greywacke and Variolite

The general Greywacke and Variolite 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, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Along with definition of Greywacke and Variolite, get to know about Properties of Greywacke and Variolite. Get to know more information about Greywacke and Variolite origin and discoverer, etymology and class.

History of Greywacke and Variolite

The history of Greywacke and Variolite 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 Variolite Origin and Discoverer

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

Etymology of Greywacke and Variolite

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

For Greywacke,

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

For Variolite,

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