Chert and Rapakivi Granite Definition

Definition of Chert and Rapakivi Granite

The general Chert and Rapakivi Granite definition can be stated as: Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture. 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 Chert and Rapakivi Granite, get to know about Properties of Chert and Rapakivi Granite. Get to know more information about Chert and Rapakivi Granite origin and discoverer, etymology and class.

History of Chert and Rapakivi Granite

The history of Chert 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.

Chert and Rapakivi Granite Origin and Discoverer

Chert 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 Chert and Rapakivi Granite. In this section, you will know about Chert and Rapakivi Granite Origin and Discoverer. Origin of Chert is Unknown whereas Origin of Rapakivi Granite is Finland, Europe. It is interesting to know the name of Chert and Rapakivi Granite discoverer. The Discoverer of Chert is Unknown and the discoverer of Rapakivi Granite is Jakob Sederholm.

Etymology of Chert and Rapakivi Granite

Along with Chert and Rapakivi Granite definition, know more about the etymology of Chert and Rapakivi Granite. Etymology of Chert and Rapakivi Granite gives information about origin and formation of a particular rock. Know more about Formation of Chert and Formation of Rapakivi Granite. The etymology of Chert is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use while that of Rapakivi Granite is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chert belongs to Sedimentary Rocks while Rapakivi Granite belongs to Igneous Rocks. The sub-class, group and other categories of Chert and Rapakivi Granite are listed below.

For Chert,

• Sub-class: Durable Rock and Hard 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