Coal and Argillite Definition

Definition of Coal and Argillite

The general Coal and Argillite 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, 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. Along with definition of Coal and Argillite, get to know about Properties of Coal and Argillite. Get to know more information about Coal and Argillite origin and discoverer, etymology and class.

History of Coal and Argillite

The history of Coal and Argillite 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 Argillite Origin and Discoverer

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

Etymology of Coal and Argillite

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

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