Coal and Picrite Definition

Definition of Coal and Picrite

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

History of Coal and Picrite

The history of Coal and Picrite 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.

Coal and Picrite Origin and Discoverer

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

Etymology of Coal and Picrite

Along with Coal and Picrite definition, know more about the etymology of Coal and Picrite. Etymology of Coal and Picrite gives information about origin and formation of a particular rock. Know more about Formation of Coal and Formation of Picrite. The etymology of Coal is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century while that of Picrite is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Coal belongs to Sedimentary Rocks while Picrite belongs to Igneous Rocks. The sub-class, group and other categories of Coal and Picrite are listed below.

For Coal,

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

For Picrite,

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