Based on their method of formation, the letters represent he following rock types;
- A = Molten magma
- B = Extrusive Igneous rock
- C = Intrusive igneous rock
- D = Sedimentary rock
- E = Metamorphic rock
What are rocks?
Rocks are large naturally occurring masses which are aggregates of minerals found on the earth.
There are three main types of rocks:
- Sedimentary rocks: formed from decayed organic matter
- Igneous rocks: produced from solidified molten magma from the earth's crust (Extrusive Igneous rock cool on the surface, Intrusive Igneous rock cools within the earth crust)
- Metamorphic rocks: formed from either igneous or sedimentary rocks that have changed form.
In conclusion, depending on how they are formed, rocks are classified into igneous, sedimentary, and metamorphic rocks.
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