Chalk and Trachyte Definition

Definition of Chalk and Trachyte

The general Chalk and Trachyte definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar. Along with definition of Chalk and Trachyte, get to know about Properties of Chalk and Trachyte. Get to know more information about Chalk and Trachyte origin and discoverer, etymology and class.

History of Chalk and Trachyte

The history of Chalk and Trachyte 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 Trachyte Origin and Discoverer

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

Etymology of Chalk and Trachyte

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

For Chalk,

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

For Trachyte,

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