Porphyry and Trondhjemite Definition

Definition of Porphyry and Trondhjemite

The general Porphyry and Trondhjemite definition can be stated as: Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix. 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 Porphyry and Trondhjemite, get to know about Properties of Porphyry and Trondhjemite. Get to know more information about Porphyry and Trondhjemite origin and discoverer, etymology and class.

History of Porphyry and Trondhjemite

The history of Porphyry 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.

Porphyry and Trondhjemite Origin and Discoverer

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

Etymology of Porphyry and Trondhjemite

Along with Porphyry and Trondhjemite definition, know more about the etymology of Porphyry and Trondhjemite. Etymology of Porphyry and Trondhjemite gives information about origin and formation of a particular rock. Know more about Formation of Porphyry and Formation of Trondhjemite. The etymology of Porphyry is From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites while that of Trondhjemite is From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Porphyry and Trondhjemite belong to Igneous Rocks. The sub-class, group and other categories of Porphyry and Trondhjemite are listed below.

For Porphyry,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• 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