Chert and Coal Definition

Definition of Chert and Coal

The general Chert and Coal definition can be stated as: Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture. On the other hand, Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. Along with definition of Chert and Coal, get to know about Properties of Chert and Coal. Get to know more information about Chert and Coal origin and discoverer, etymology and class.

History of Chert and Coal

The history of Chert and Coal 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.

Chert and Coal Origin and Discoverer

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

Etymology of Chert and Coal

Along with Chert and Coal definition, know more about the etymology of Chert and Coal. Etymology of Chert and Coal gives information about origin and formation of a particular rock. Know more about Formation of Chert and Formation of Coal. The etymology of Chert is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use while that of Coal is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chert and Coal belong to Sedimentary Rocks. The sub-class, group and other categories of Chert and Coal are listed below.

For Chert,

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

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