Nephelinite and Chalk Definition

Definition of Nephelinite and Chalk

The general Nephelinite and Chalk definition can be stated as: Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).. On the other hand, Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. Along with definition of Nephelinite and Chalk, get to know about Properties of Nephelinite and Chalk. Get to know more information about Nephelinite and Chalk origin and discoverer, etymology and class.

History of Nephelinite and Chalk

The history of Nephelinite and Chalk 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.

Nephelinite and Chalk Origin and Discoverer

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

Etymology of Nephelinite and Chalk

Along with Nephelinite and Chalk definition, know more about the etymology of Nephelinite and Chalk. Etymology of Nephelinite and Chalk gives information about origin and formation of a particular rock. Know more about Formation of Nephelinite and Formation of Chalk. The etymology of Nephelinite is from French néphéline, from Greek nephelē while that of Chalk is from French néphéline, from Greek nephelē. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Nephelinite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks. The sub-class, group and other categories of Nephelinite and Chalk are listed below.

For Nephelinite,

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

For Chalk,

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