Chalk and Ignimbrite Definition

Definition of Chalk and Ignimbrite

The general Chalk and Ignimbrite definition can be stated as: Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. On the other hand, Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows. Along with definition of Chalk and Ignimbrite, get to know about Properties of Chalk and Ignimbrite. Get to know more information about Chalk and Ignimbrite origin and discoverer, etymology and class.

History of Chalk and Ignimbrite

The history of Chalk and Ignimbrite 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 Ignimbrite Origin and Discoverer

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

Etymology of Chalk and Ignimbrite

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

For Chalk,

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

For Ignimbrite,

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