Variolite and Lignite Definition

Definition of Variolite and Lignite

The general Variolite and Lignite definition can be stated as: Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. 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 Variolite and Lignite, get to know about Properties of Variolite and Lignite. Get to know more information about Variolite and Lignite origin and discoverer, etymology and class.

History of Variolite and Lignite

The history of Variolite 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.

Variolite and Lignite Origin and Discoverer

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

Etymology of Variolite and Lignite

Along with Variolite and Lignite definition, know more about the etymology of Variolite and Lignite. Etymology of Variolite and Lignite gives information about origin and formation of a particular rock. Know more about Formation of Variolite and Formation of Lignite. The etymology of Variolite is From Latin varius, speckled, variegated while that of Lignite is From Latin varius, speckled, variegated. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Variolite belongs to Igneous Rocks while Lignite belongs to Sedimentary Rocks. The sub-class, group and other categories of Variolite and Lignite are listed below.

For Variolite,

• Sub-class: Durable Rock and Hard Rock
• Group: Volcanic
• Other Categories: 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