Slate and Coal Definition

Definition of Slate and Coal

The general Slate and Coal definition can be stated as: 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. 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 Slate and Coal, get to know about Properties of Slate and Coal. Get to know more information about Slate and Coal origin and discoverer, etymology and class.

History of Slate and Coal

The history of Slate 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.

Slate and Coal Origin and Discoverer

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

Etymology of Slate and Coal

Along with Slate and Coal definition, know more about the etymology of Slate and Coal. Etymology of Slate and Coal gives information about origin and formation of a particular rock. Know more about Formation of Slate and Formation of Coal. The etymology of Slate is From Old French esclate, from esclat (French éclat) while that of Coal is From Old French esclate, from esclat (French éclat). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Slate belongs to Metamorphic Rocks while Coal belongs to Sedimentary Rocks. The sub-class, group and other categories of Slate and Coal are listed below.

For Slate,

• Sub-class: Durable Rock and Medium Hardness 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