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Because coal and most limestones are formed from organic material (living things). Coal is formed from compressed plant material, and limestone from animal remains (hard parts: soft parts are almost always rotted, broken by force or consumed by predators). From here you get different kinds of coal, depending on how long and how deep they have been buried. Limestones vary according to their composition (through formation). 'Shelly limestone' is composed of shell, as the name suggests. Chalk is composed of coccoliths - minuscule shell of tiny sea creatures millions of years ago. These rocks are, therefore, fossils.
Coal is classified as an organic sedimentary rock because it is mainly formed from the remains of plant material. Limestone is classified as an organic sedimentary rock in some cases when it contains a high percentage of organic matter, such as shells and coral fragments.
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How are coal and limestone similar to each other?
Coal and limestone are both sedimentary rocks that are formed from the accumulation of organic material (coal) or calcium carbonate (limestone) over millions of years. Both are used as natural resources in various industries, with coal being primarily used for energy production and limestone used in construction, agriculture, and manufacturing.
Which type of rock can be formed by chemical reactions?
Sedimentary rocks can be formed by chemical reactions when minerals in water precipitate out and settle to form rock layers. Examples of sedimentary rocks formed by chemical reactions include limestone and halite.
What type of sedimentary rock is 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.
Is coal an inorganic rock?
Coal is not a rock, but rather a sedimentary organic rock that forms from plant debris. It is comprised of organic matter like carbon, hydrogen, and oxygen, making it different from inorganic rocks which are formed from non-living materials.
What is limstone made from?
Limestone is a sedimentary rock primarily made up of calcium carbonate (CaCO3) derived from the remnants of marine organisms like coral and shells. Over millions of years, these remains accumulate and undergo lithification to form limestone rocks.
Why are coal and rock limestone classified as organic sedimentary rocks?
The material comprising the rocks coal and limestone are derived from organisms. Therefore, they are classified as organic sedimentary rocks.
How can sedimentary rocks can be classified?
sedimentary rocks can be classified by detrial, chemical ,or organic
Is Kaibab an organic sedimentary rock?
No, Kaibab is not an organic sedimentary rock. It is a type of limestone that was formed through the accumulation of calcium carbonate from marine organisms.
What are the names of the organic sedimentary rocks?
Examples of sedimentary rock include:BauxiteLimestoneDolostoneBrecciaConglomerateShaleMudstoneBituminous CoalSandstoneHaliteGypsumChalkCoquinaLateriteArkoseGraywackeClaystoneSiltstoneChert
What examples of a sedimentary rock are chalk and coal?
Chalk is a type of limestone. Limestone and coal are both organic sedimentary rocks.
What are a couple of examples of sedimentary rocks?
Rocks that are categorized as sedimentary rocks include sandstone, breccia shale, limestone and selenite. Sedimentary rocks are classified by their grain size.
What are examples of organic sedimentary rock?
Examples of organic sedimentary rocks include coal, which forms from the accumulation and compaction of plant remains, and limestone, which can contain organic debris such as shells and coral. Organic sedimentary rocks are derived from the remains of living organisms.
What are sedimentary rocks from living or once-living material called?
Sedimentary rocks formed from living or once-living material are called organic sedimentary rocks. Examples include limestone, coal, and chalk.
What kind of sedimentary rocks are crystalline limestone and chert classified as?
Crystalline limestone and chert are classified as biochemical sedimentary rocks. Crystalline limestone forms from the accumulation of calcite-rich remains of marine organisms, while chert forms from the silica-rich remains of marine organisms such as radiolarians or diatoms.
What sedimentary rocks are formed from the remains of plants and animals?
Sedimentary rocks formed from the remains of plants and animals are called organic sedimentary rocks. Examples include coal, formed from the remains of plants, and limestone, formed from the shells of marine organisms.
A marble is a sedimentary metamorphic or igneous?
Marble, the rock, is metamorphic. From limestone.
How are sedimentary rocks classified?
Sedimentary rocks are classified based on their mineral composition, grain size, texture, and the way they were formed. The three main types of sedimentary rocks are clastic, chemical, and organic. Clastic rocks are made up of broken fragments of other rocks, chemical rocks form from precipitation of minerals from water, and organic rocks are formed from the accumulation of plant and animal remains.
