Gneiss and Marl Definition

Definition of Gneiss and Marl

The general Gneiss and Marl definition can be stated as: Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. On the other hand, Marl is an unconsolidated sedimentary rock consisting of clay and lime. Along with definition of Gneiss and Marl, get to know about Properties of Gneiss and Marl. Get to know more information about Gneiss and Marl origin and discoverer, etymology and class.

History of Gneiss and Marl

The history of Gneiss and Marl 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.

Gneiss and Marl Origin and Discoverer

Gneiss and Marl definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Gneiss and Marl. In this section, you will know about Gneiss and Marl Origin and Discoverer. Origin of Gneiss and Marl are Unknown. It is interesting to know the name of Gneiss and Marl discoverer. The discoverer of Gneiss and Marl are Unknown.

Etymology of Gneiss and Marl

Along with Gneiss and Marl definition, know more about the etymology of Gneiss and Marl. Etymology of Gneiss and Marl gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Marl. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Marl is From the Middle High German verb gneist (to spark; so called because the rock glitters). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Gneiss belongs to Metamorphic Rocks while Marl belongs to Sedimentary Rocks. The sub-class, group and other categories of Gneiss and Marl are listed below.

For Gneiss,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock

For Marl,

• Sub-class: Durable Rock and Soft Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock