Shale and Coal Definition

Definition of Shale and Coal

The general Shale and Coal definition can be stated as: Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles. 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 Shale and Coal, get to know about Properties of Shale and Coal. Get to know more information about Shale and Coal origin and discoverer, etymology and class.

History of Shale and Coal

The history of Shale 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.

Shale and Coal Origin and Discoverer

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

Etymology of Shale and Coal

Along with Shale and Coal definition, know more about the etymology of Shale and Coal. Etymology of Shale and Coal gives information about origin and formation of a particular rock. Know more about Formation of Shale and Formation of Coal. The etymology of Shale is From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate, while that of Coal is From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate,. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Shale and Coal belong to Sedimentary Rocks. The sub-class, group and other categories of Shale and Coal are listed below.

For Shale,

• 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