Picrite and Coal Definition

Definition of Picrite and Coal

The general Picrite and Coal definition can be stated as: Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. On the other hand, Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. Along with definition of Picrite and Coal, get to know about Properties of Picrite and Coal. Get to know more information about Picrite and Coal origin and discoverer, etymology and class.

History of Picrite and Coal

The history of Picrite and Coal 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.

Picrite and Coal Origin and Discoverer

Picrite and Coal definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Picrite and Coal. In this section, you will know about Picrite and Coal Origin and Discoverer. Origin of Picrite is Hawaii Islands whereas Origin of Coal is USA. It is interesting to know the name of Picrite and Coal discoverer. The Discoverer of Picrite is Unknown and the discoverer of Coal is John Peter Salley.

Etymology of Picrite and Coal

Along with Picrite and Coal definition, know more about the etymology of Picrite and Coal. Etymology of Picrite and Coal gives information about origin and formation of a particular rock. Know more about Formation of Picrite and Formation of Coal. The etymology of Picrite is From Greek pikros bitter + -ite, 19th century while that of Coal is From Greek pikros bitter + -ite, 19th century. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Picrite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks. The sub-class, group and other categories of Picrite and Coal are listed below.

For Picrite,

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

For Coal,

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