Shale and Ijolite Definition

Definition of Shale and Ijolite

The general Shale and Ijolite definition can be stated as: Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles. On the other hand, Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite. Along with definition of Shale and Ijolite, get to know about Properties of Shale and Ijolite. Get to know more information about Shale and Ijolite origin and discoverer, etymology and class.

History of Shale and Ijolite

The history of Shale and Ijolite 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.

Shale and Ijolite Origin and Discoverer

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

Etymology of Shale and Ijolite

Along with Shale and Ijolite definition, know more about the etymology of Shale and Ijolite. Etymology of Shale and Ijolite gives information about origin and formation of a particular rock. Know more about Formation of Shale and Formation of Ijolite. The etymology of Shale is From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate, while that of Ijolite is From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate,. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Shale belongs to Sedimentary Rocks while Ijolite belongs to Igneous Rocks. The sub-class, group and other categories of Shale and Ijolite are listed below.

For Shale,

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

For Ijolite,

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