Chalk and Trondhjemite Definition

Definition of Chalk and Trondhjemite

The general Chalk and Trondhjemite definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.. Along with definition of Chalk and Trondhjemite, get to know about Properties of Chalk and Trondhjemite. Get to know more information about Chalk and Trondhjemite origin and discoverer, etymology and class.

History of Chalk and Trondhjemite

The history of Chalk and Trondhjemite 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.

Chalk and Trondhjemite Origin and Discoverer

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

Etymology of Chalk and Trondhjemite

Along with Chalk and Trondhjemite definition, know more about the etymology of Chalk and Trondhjemite. Etymology of Chalk and Trondhjemite gives information about origin and formation of a particular rock. Know more about Formation of Chalk and Formation of Trondhjemite. The etymology of Chalk is From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone while that of Trondhjemite is From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chalk belongs to Sedimentary Rocks while Trondhjemite belongs to Igneous Rocks. The sub-class, group and other categories of Chalk and Trondhjemite are listed below.

For Chalk,

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

For Trondhjemite,

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