Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
Fine Grained Rock, Opaque Rock
Decorative Aggregates, Homes, Interior Decoration
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, raw material for manufacture of quicklime and slaked lime, Source of calcium
Artifacts, Monuments, Sculpture, Small Figurines
Alumina Refineries, Creating Artwork, Drawing on blackboards, Gymnasts, athletes and mountain climbers use for grip, In aquifers, Paper Industry, Production of Lime, Raw material for manufacture of quicklime, slaked lime, Soil Conditioner, Whiting, Whiting material in toothpaste, paint and paper
Clasts are smooth to touch, Is one of the oldest rock, Smooth to touch, Very fine grained rock
Archaeological Significance
Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.
Calcite, Clay, Clay Minerals, Quartz, Sand
Biological Weathering, Chemical Weathering
Chemical Erosion, Coastal Erosion, Water Erosion
Deposits in Eastern Continents
Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
England, France, Germany, Spain, United Kingdom
Deposits in Western Continents
Deposits in Oceania Continent
Adelaide, New Zealand, Queensland, Victoria, Yorke Peninsula
Learn more about Properties of Chalk
What is Chalk? In this section, we will learn more about properties of Chalk i.e. physical and thermal properties. Physical properties of Chalk include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Chalk is 5.00 N/mm2. Streak of Chalk is white while its cleavage is . Luster of Chalk is dull and its fracture is . Chalk is opaque in nature. Know all about Chalk, What is Chalk, its composition, features, facts and reserves in next sections.
Know about Composition of Chalk
What is Chalk composed of? Get to know about composition of Chalk here. Chalk definition gives information about the Formation of Chalk and its composition.The composition of Chalk can be further divided into mineral and compound content. The mineral content of Chalk rock includes Calcite, Clay, Clay Minerals, Quartz, Sand and The compound content of Chalk rock includes Ca, NaCl, CaO. Almost all rocks undergo transformation process. Know all about Chalk rock in next section.