Argillite and Rapakivi Granite Definition

Definition of Argillite and Rapakivi Granite

The general Argillite and Rapakivi Granite definition can be stated as: Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. On the other hand, Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Along with definition of Argillite and Rapakivi Granite, get to know about Properties of Argillite and Rapakivi Granite. Get to know more information about Argillite and Rapakivi Granite origin and discoverer, etymology and class.

History of Argillite and Rapakivi Granite

The history of Argillite and Rapakivi Granite 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.

Argillite and Rapakivi Granite Origin and Discoverer

Argillite and Rapakivi Granite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Argillite and Rapakivi Granite. In this section, you will know about Argillite and Rapakivi Granite Origin and Discoverer. Origin of Argillite is Unknown whereas Origin of Rapakivi Granite is Finland, Europe. It is interesting to know the name of Argillite and Rapakivi Granite discoverer. The Discoverer of Argillite is Unknown and the discoverer of Rapakivi Granite is Jakob Sederholm.

Etymology of Argillite and Rapakivi Granite

Along with Argillite and Rapakivi Granite definition, know more about the etymology of Argillite and Rapakivi Granite. Etymology of Argillite and Rapakivi Granite gives information about origin and formation of a particular rock. Know more about Formation of Argillite and Formation of Rapakivi Granite. The etymology of Argillite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite while that of Rapakivi Granite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Argillite belongs to Sedimentary Rocks while Rapakivi Granite belongs to Igneous Rocks. The sub-class, group and other categories of Argillite and Rapakivi Granite are listed below.

For Argillite,

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

For Rapakivi Granite,

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