Greywacke and Trondhjemite Definition

Definition of Greywacke and Trondhjemite

The general Greywacke and Trondhjemite 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, Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.. Along with definition of Greywacke and Trondhjemite, get to know about Properties of Greywacke and Trondhjemite. Get to know more information about Greywacke and Trondhjemite origin and discoverer, etymology and class.

History of Greywacke and Trondhjemite

The history of Greywacke and Trondhjemite 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 Trondhjemite Origin and Discoverer

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

Etymology of Greywacke and Trondhjemite

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

For Greywacke,

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

For Trondhjemite,

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