Variolite and Shale Definition

Definition of Variolite and Shale

The general Variolite and Shale 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, Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles. Along with definition of Variolite and Shale, get to know about Properties of Variolite and Shale. Get to know more information about Variolite and Shale origin and discoverer, etymology and class.

History of Variolite and Shale

The history of Variolite and Shale 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 Shale Origin and Discoverer

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

Etymology of Variolite and Shale

Along with Variolite and Shale definition, know more about the etymology of Variolite and Shale. Etymology of Variolite and Shale gives information about origin and formation of a particular rock. Know more about Formation of Variolite and Formation of Shale. The etymology of Variolite is From Latin varius, speckled, variegated while that of Shale 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 Shale belongs to Sedimentary Rocks. The sub-class, group and other categories of Variolite and Shale are listed below.

For Variolite,

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

For Shale,

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