Argillite and Coal Definition

Definition of Argillite and Coal

The general Argillite and Coal definition can be stated as: Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. 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 Argillite and Coal, get to know about Properties of Argillite and Coal. Get to know more information about Argillite and Coal origin and discoverer, etymology and class.

History of Argillite and Coal

The history of Argillite 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.

Argillite and Coal Origin and Discoverer

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

Etymology of Argillite and Coal

Along with Argillite and Coal definition, know more about the etymology of Argillite and Coal. Etymology of Argillite and Coal gives information about origin and formation of a particular rock. Know more about Formation of Argillite and Formation of Coal. The etymology of Argillite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite while that of Coal is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Argillite and Coal belong to Sedimentary Rocks. The sub-class, group and other categories of Argillite and Coal are listed below.

For Argillite,

• Sub-class: Durable Rock and Soft Rock
• Group:
• Other Categories: Fine grained rock and Opaque rock

For Coal,

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