Coal and Troctolite Definition

Definition of Coal and Troctolite

The general Coal and Troctolite 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, Troctolite is a mafic intrusive rock type. It consists essentially of major but variable amounts of olivine and calcic plagioclase along with minor pyroxene. It is an olivine-rich anorthosite, or a pyroxene-depleted relative of gabbro. Along with definition of Coal and Troctolite, get to know about Properties of Coal and Troctolite. Get to know more information about Coal and Troctolite origin and discoverer, etymology and class.

History of Coal and Troctolite

The history of Coal and Troctolite 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 Troctolite Origin and Discoverer

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

Etymology of Coal and Troctolite

Along with Coal and Troctolite definition, know more about the etymology of Coal and Troctolite. Etymology of Coal and Troctolite gives information about origin and formation of a particular rock. Know more about Formation of Coal and Formation of Troctolite. 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 Troctolite 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 Troctolite belongs to Igneous Rocks. The sub-class, group and other categories of Coal and Troctolite are listed below.

For Coal,

• 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 Troctolite,

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