Chalk and Ijolite Definition

Definition of Chalk and Ijolite

The general Chalk and Ijolite definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite. Along with definition of Chalk and Ijolite, get to know about Properties of Chalk and Ijolite. Get to know more information about Chalk and Ijolite origin and discoverer, etymology and class.

History of Chalk and Ijolite

The history of Chalk and Ijolite 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.

Chalk and Ijolite Origin and Discoverer

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

Etymology of Chalk and Ijolite

Along with Chalk and Ijolite definition, know more about the etymology of Chalk and Ijolite. Etymology of Chalk and Ijolite gives information about origin and formation of a particular rock. Know more about Formation of Chalk and Formation of Ijolite. The etymology of Chalk is From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone while that of Ijolite is From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chalk belongs to Sedimentary Rocks while Ijolite belongs to Igneous Rocks. The sub-class, group and other categories of Chalk and Ijolite are listed below.

For Chalk,

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

For Ijolite,

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