Slate and Lignite Definition

Definition of Slate and Lignite

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

History of Slate and Lignite

The history of Slate 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.

Slate and Lignite Origin and Discoverer

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

Etymology of Slate and Lignite

Along with Slate and Lignite definition, know more about the etymology of Slate and Lignite. Etymology of Slate and Lignite gives information about origin and formation of a particular rock. Know more about Formation of Slate and Formation of Lignite. The etymology of Slate is From Old French esclate, from esclat (French éclat) while that of Lignite 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 Lignite belongs to Sedimentary Rocks. The sub-class, group and other categories of Slate and Lignite 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 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