Shale and Lignite Definition

Definition of Shale and Lignite

The general Shale and Lignite 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, Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat. Along with definition of Shale and Lignite, get to know about Properties of Shale and Lignite. Get to know more information about Shale and Lignite origin and discoverer, etymology and class.

History of Shale and Lignite

The history of Shale and Lignite 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 Lignite Origin and Discoverer

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

Etymology of Shale and Lignite

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

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