Argillite and Lignite Definition

Definition of Argillite and Lignite

The general Argillite and Lignite definition can be stated as: Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. 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 Argillite and Lignite, get to know about Properties of Argillite and Lignite. Get to know more information about Argillite and Lignite origin and discoverer, etymology and class.

History of Argillite and Lignite

The history of Argillite 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.

Argillite and Lignite Origin and Discoverer

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

Etymology of Argillite and Lignite

Along with Argillite and Lignite definition, know more about the etymology of Argillite and Lignite. Etymology of Argillite and Lignite gives information about origin and formation of a particular rock. Know more about Formation of Argillite and Formation of Lignite. The etymology of Argillite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite while that of Lignite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Argillite and Lignite belong to Sedimentary Rocks. The sub-class, group and other categories of Argillite and Lignite are listed below.

For Argillite,

• Sub-class: Durable Rock and Soft Rock
• Group:
• Other Categories: Fine grained rock and Opaque rock

For Lignite,

• Sub-class: Durable Rock and Soft Rock
• Group:
• Other Categories: Coarse grained rock, Fine grained rock, Medium grained rock and Opaque rock