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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.

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What makes a sedimentary rock different from other types of rocks?

Sedimentary rocks are formed from the accumulation and compression of sediments, such as sand or mud, over time. This process sets them apart from igneous rocks, which form from the cooling and solidification of molten rock, and metamorphic rocks, which are formed from the alteration of existing rocks due to heat and pressure. Sedimentary rocks often contain fossils and layers, making them unique in their composition and appearance.


What makes the 3 types of rocks different?

The three types of rocks - igneous, sedimentary, and metamorphic - are different in terms of how they are formed. Igneous rocks are formed from the cooling and solidification of molten material, sedimentary rocks are formed from the accumulation and cementation of mineral and organic particles, while metamorphic rocks are formed from the alteration of existing rocks due to heat and pressure within the Earth's crust.


What makes up 78 of the earth's air?

Nitrogen (symbol N2) makes up 78% of the composition of air.


What is the composition of a sedimentary rock?

Sedimentary rocks are composed of particles that have been eroded, transported, and deposited by wind, water, or ice. These particles can include minerals, organic material, and fragments of other rocks. Over time, these particles become compacted and cemented together to form solid sedimentary rocks.


Is fine grained sedimentary rock smooth?

Fine-grained sedimentary rocks are typically smooth in texture due to their small grain size, which makes it difficult to discern individual grains with the naked eye. The smoothness can vary depending on factors such as the mineral composition and the level of compaction of the rock.

Related Questions

What makes igneous sedimentary and metamorphic rocks different from each other?

The way in which they were formed.


What makes salts different?

Each salt has a different chemical composition and consequently different chemical and physical properties.


What makes a sedimentary rock different from other types of rocks?

Sedimentary rocks are formed from the accumulation and compression of sediments, such as sand or mud, over time. This process sets them apart from igneous rocks, which form from the cooling and solidification of molten rock, and metamorphic rocks, which are formed from the alteration of existing rocks due to heat and pressure. Sedimentary rocks often contain fossils and layers, making them unique in their composition and appearance.


What makes a star's spectrum appear to be different from another stars?

The chemical composition of the star.


Are sedimentary rocks inorganic?

Yes, sedimentary rocks are typically formed from the accumulation and lithification of inorganic materials such as minerals, shells, and organic debris. Organic matter can be present in sedimentary rocks, but it generally makes up a small percentage of the rock's composition.


What rock makes up ten percent of all sedimentary rocks?

Limestone makes up ten percent of all sedimentary rocks.


What is the size of a sedimentary rock?

Your question makes little sense, "a sedimentary rock" can be of virtually any size.


Facts about sedimentary rocks?

95or all fossils found. Sedimentary rock makes up ¾ of the earth's surface.


What kind of rock makes up the moons maria?

Sedimentary


What makes the 3 types of rocks different?

The three types of rocks - igneous, sedimentary, and metamorphic - are different in terms of how they are formed. Igneous rocks are formed from the cooling and solidification of molten material, sedimentary rocks are formed from the accumulation and cementation of mineral and organic particles, while metamorphic rocks are formed from the alteration of existing rocks due to heat and pressure within the Earth's crust.


What makes one kind of matter different from another?

Examples:- the state of matter- the chemical composition- the chemical properties- the physical properties


What makes up a sedimentary rock and what characteristics does it show?

Sedimentary rocks are simply the result of erosion, deposition, and cementation of different types of rock and there particles. They almost ALWAYS have layers that you can clearly see, because of being pushed together. Sometimes they may even have fossils in them.