Shonkinite and Trondhjemite Definition

Definition of Shonkinite and Trondhjemite

The general Shonkinite and Trondhjemite definition can be stated as: Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents. 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 Shonkinite and Trondhjemite, get to know about Properties of Shonkinite and Trondhjemite. Get to know more information about Shonkinite and Trondhjemite origin and discoverer, etymology and class.

History of Shonkinite and Trondhjemite

The history of Shonkinite 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.

Shonkinite and Trondhjemite Origin and Discoverer

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

Etymology of Shonkinite and Trondhjemite

Along with Shonkinite and Trondhjemite definition, know more about the etymology of Shonkinite and Trondhjemite. Etymology of Shonkinite and Trondhjemite gives information about origin and formation of a particular rock. Know more about Formation of Shonkinite and Formation of Trondhjemite. The etymology of Shonkinite is From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US while that of Trondhjemite is From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Shonkinite and Trondhjemite belong to Igneous Rocks. The sub-class, group and other categories of Shonkinite and Trondhjemite are listed below.

For Shonkinite,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: Coarse grained rock, Fine grained rock, Medium 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