It is made of almost entirely of organic matter.
Coal is an organic sedimentary rock. It has conchoidal fracture. The composition is so different because coal, depending on age, contains mostly carbon as it is formed from plant cellulose. It is different because it is carbon, as opposed to a common mineral like other sedimentary rocks.
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.
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.
Examples of sedimentary rock include:BauxiteLimestoneDolostoneBrecciaConglomerateShaleMudstoneBituminous CoalSandstoneHaliteGypsumChalkCoquinaLateriteArkoseGraywackeClaystoneSiltstoneChert
Other types of rocks include volcanic rocks (such as basalt and pumice), hydrothermal rocks (like geyserite and travertine), and organic rocks (such as coal and limestone). These rocks form from specific processes or conditions that differ from the formation of igneous, sedimentary, and metamorphic rocks.
Coal and Sandstone are two types of sedimentary rocks.
Coal is an organic sedimentary rock. It has conchoidal fracture. The composition is so different because coal, depending on age, contains mostly carbon as it is formed from plant cellulose. It is different because it is carbon, as opposed to a common mineral like other sedimentary rocks.
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.
The material comprising the rocks coal and limestone are derived from organisms. Therefore, they are classified as organic sedimentary rocks.
Coal is a sedimentary rock. However, harder forms of coal, because of exposure to elevated temperature and pressure, are metamorphic rock.
it can be sedimentary rocks
Coal and chalk.
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.
Examples of sedimentary rock include:BauxiteLimestoneDolostoneBrecciaConglomerateShaleMudstoneBituminous CoalSandstoneHaliteGypsumChalkCoquinaLateriteArkoseGraywackeClaystoneSiltstoneChert
Other types of rocks include volcanic rocks (such as basalt and pumice), hydrothermal rocks (like geyserite and travertine), and organic rocks (such as coal and limestone). These rocks form from specific processes or conditions that differ from the formation of igneous, sedimentary, and metamorphic rocks.
Most non-clastic sedimentary rocks are made up of minerals that have precipitated from water, such as limestone, which is composed of calcite. Other non-clastic sedimentary rocks include organic-rich rocks like coal and chert, a silica-rich rock formed from the remains of marine organisms.