Greywacke and Shoshonite Definition

Definition of Greywacke and Shoshonite

The general Greywacke and Shoshonite 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, Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass. Along with definition of Greywacke and Shoshonite, get to know about Properties of Greywacke and Shoshonite. Get to know more information about Greywacke and Shoshonite origin and discoverer, etymology and class.

History of Greywacke and Shoshonite

The history of Greywacke and Shoshonite 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 Shoshonite Origin and Discoverer

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

Etymology of Greywacke and Shoshonite

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

For Greywacke,

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

For Shoshonite,

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