Coal and Chalk Definition

Definition of Coal and Chalk

The general Coal and Chalk definition can be stated as: Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. On the other hand, Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. Along with definition of Coal and Chalk, get to know about Properties of Coal and Chalk. Get to know more information about Coal and Chalk origin and discoverer, etymology and class.

History of Coal and Chalk

The history of Coal 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.

Coal and Chalk Origin and Discoverer

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

Etymology of Coal and Chalk

Along with Coal and Chalk definition, know more about the etymology of Coal and Chalk. Etymology of Coal and Chalk gives information about origin and formation of a particular rock. Know more about Formation of Coal and Formation of Chalk. The etymology of Coal is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century while that of Chalk is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Coal and Chalk belong to Sedimentary Rocks. The sub-class, group and other categories of Coal and Chalk are listed below.

For Coal,

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