Coal and Slate Definition

Definition of Coal and Slate

The general Coal and Slate 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, Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. Along with definition of Coal and Slate, get to know about Properties of Coal and Slate. Get to know more information about Coal and Slate origin and discoverer, etymology and class.

History of Coal and Slate

The history of Coal and Slate 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 Slate Origin and Discoverer

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

Etymology of Coal and Slate

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

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