Chalk is a type of limestone. Limestone and coal are both organic sedimentary rocks.
Chalk and coal are examples of a kind of sedimentary rock called biochemical sedimentary rock. Biochemical sedimentary rocks form from the accumulation and lithification of organic remains, such as shells and plant material.
Chalk and coal are examples of biochemical sedimentary rocks. Biochemical sedimentary rocks are formed from the accumulation and compression of organic remains such as shells, coral, or plant material.
Organic sedimentary rock is derived mostly from the remains of organisms which have lithified into rock. Examples would be coal and chalk.
Coal is a sedimentary rock that forms from the remains of plants and organic matter, while chalk is a sedimentary rock primarily composed of the calcium carbonate remains of marine organisms like plankton and shellfish.
A sedimentary rock formed from materials that were once living is called organic sedimentary rock. Examples include limestone, coal, and chalk, which are composed of the remains of marine organisms, plants, or other organic matter.
Examples of sedimentary rock include:BauxiteLimestoneDolostoneBrecciaConglomerateShaleMudstoneBituminous CoalSandstoneHaliteGypsumChalkCoquinaLateriteArkoseGraywackeClaystoneSiltstoneChert
Chalk is a form of limestone, a sedimentary rock.
Rock gypsum is a sedimentary rock. These rocks can be transparent or opaque. Examples could be chalk and chalk boards.
Rock gypsum is a sedimentary rock. These rocks can be transparent or opaque. Examples could be chalk and chalk boards.
Sedimentary rocks formed from living or once-living material are called organic sedimentary rocks. Examples include limestone, coal, and chalk.
Limestone is an example of a bioclastic sedimentary rock, formed mainly from the accumulation of shell fragments or other biological debris. These rocks can contain a variety of fossils, such as fragments of shells, corals, or other marine organisms.
Chalk can be used as a sedimentary rock for right and coal as the same type of rock, but for fuel.