How are sedimentary rocks different from igneous and metamorphic rocks?

Question

Maya Adams · Accepted Answer

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The foundation of geology is the study of igneous, sedimentary and metamorphic rocks. The types of rocks are interconnected by a set of processes called the rock circle.

Igneous rocks form when magma or lava cools and hardens. When the red hot lava cools, a dark-colored igneous rock called basalt will form. If this melted material had stayed deep beneath Earth’s surface, a very different kind of igneous rock would have been produced as the material cooled. Different kinds of igneous rocks form when magma and lava cool and harden.
The word igneous comes from the Latin word ignis, which means “fire.” Perhaps that is why people often associate igneous rock with fiery volcanic eruptions.
There are two types of Igneous rocks:
- Intrusive igneous rock are form when magma hardens beneath Earth’s surface.
- Extrusive igneous rock is when lava hardens.
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- Metamorphic rocks
  Recall that metamorphic rocks form when existing rocks are changed by heat and pressure. Metamorphism is a very appropriate name for this process because it means to change form. Rocks produced during metamorphism often look much different from the original rocks, or parent rocks.

Aaron Anderson · Answer

undefined Sedimentary rocks form from the accumulation and cementation of sediments, while igneous rocks form from the cooling and solidification of molten magma or lava, and metamorphic rocks form from the alteration of pre-existing rocks through heat, pressure, or chemical processes. Sedimentary rocks often contain fossils and are typically formed near the Earth's surface, while igneous rocks form deep within the Earth's crust or at its surface, and metamorphic rocks form under high temperature and pressure conditions deep within the Earth's crust. Sedimentary rocks are often layered or stratified, while igneous rocks may exhibit a crystalline texture or a glassy appearance, and metamorphic rocks may display foliation or banding.