Chalk and Lignite Definition

Definition of Chalk and Lignite

The general Chalk and Lignite definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat. Along with definition of Chalk and Lignite, get to know about Properties of Chalk and Lignite. Get to know more information about Chalk and Lignite origin and discoverer, etymology and class.

History of Chalk and Lignite

The history of Chalk and Lignite 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 Lignite Origin and Discoverer

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

Etymology of Chalk and Lignite

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

For Chalk,

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

For Lignite,

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