Lignite and Tonalite Definition

Definition of Lignite and Tonalite

The general Lignite and Tonalite 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, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Along with definition of Lignite and Tonalite, get to know about Properties of Lignite and Tonalite. Get to know more information about Lignite and Tonalite origin and discoverer, etymology and class.

History of Lignite and Tonalite

The history of Lignite and Tonalite 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 Tonalite Origin and Discoverer

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

Etymology of Lignite and Tonalite

Along with Lignite and Tonalite definition, know more about the etymology of Lignite and Tonalite. Etymology of Lignite and Tonalite gives information about origin and formation of a particular rock. Know more about Formation of Lignite and Formation of Tonalite. The etymology of Lignite is From French, Latin lignum wood + -ite1 while that of Tonalite 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 Tonalite belongs to Igneous Rocks. The sub-class, group and other categories of Lignite and Tonalite are listed below.

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

For Tonalite,

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