Lignite and Variolite Definition

Definition of Lignite and Variolite

The general Lignite and Variolite definition can be stated as: Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat. On the other hand, 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. Along with definition of Lignite and Variolite, get to know about Properties of Lignite and Variolite. Get to know more information about Lignite and Variolite origin and discoverer, etymology and class.

History of Lignite and Variolite

The history of Lignite and Variolite 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.

Lignite and Variolite Origin and Discoverer

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

Etymology of Lignite and Variolite

Along with Lignite and Variolite definition, know more about the etymology of Lignite and Variolite. Etymology of Lignite and Variolite gives information about origin and formation of a particular rock. Know more about Formation of Lignite and Formation of Variolite. The etymology of Lignite is From French, Latin lignum wood + -ite1 while that of Variolite is From French, Latin lignum wood + -ite1. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Lignite belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks. The sub-class, group and other categories of Lignite and Variolite are listed below.

For Lignite,

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

For Variolite,

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