Chalk and Tonalite Definition

Definition of Chalk and Tonalite

The general Chalk and Tonalite definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Along with definition of Chalk and Tonalite, get to know about Properties of Chalk and Tonalite. Get to know more information about Chalk and Tonalite origin and discoverer, etymology and class.

History of Chalk and Tonalite

The history of Chalk and Tonalite 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 Tonalite Origin and Discoverer

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

Etymology of Chalk and Tonalite

Along with Chalk and Tonalite definition, know more about the etymology of Chalk and Tonalite. Etymology of Chalk and Tonalite gives information about origin and formation of a particular rock. Know more about Formation of Chalk and Formation of Tonalite. 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 Tonalite 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 Tonalite belongs to Igneous Rocks. The sub-class, group and other categories of Chalk and Tonalite are listed below.

For Chalk,

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

For Tonalite,

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