Why fossils are not found in igneous and metamorphic rocks?

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Solution

Dear student,

The igneous rocks are the hardest of all rocks that are formed by the cooling and consequent solidification of the earth's lava. On the other hand, metamorphic rocks are formed when igneous or sedimentary rocks are altered due to high pressure.

Fossils are not found in these rocks as the temperature and pressure conditions of these rocks destroys the fossil fuels.

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Similar questions

Q. Sometimes igneous and sedimentary rocks are changed into metamorphic rocks.

Consider the following statements
1. Igneous rocks are the oldest rocks, while metamorphic are being derivative of igneous rocks and sedimentary rocks.
2. Resistance to weathering and erosion is less to metamorphic rocks compared to igneous rocks
3. Tendency to react with acids is higher to metamorphic rocks when compared to igneous rocks.
Which of the above statement(s) is/are correct?

Tick the correct answer.

(i) The rock which is made up of molten magma is

(a) Igneous

(b) Sedimentary

(ii) The innermost layer of the Earth is

(a) Crust

(b) Core

(iii) Gold, petroleum and coal are examples of

(a) Rocks

(b) Minerals

(iv) Rocks which contain fossils are

(a) Sedimentary rocks

(b) Metamorphic rocks

(v) The thinnest layer of the Earth is

(a) Crust

(b) Mantle

Q.  Minerals can be found in igneous, metamorphic and sedimentary rocks.

Q. Igneous rocks can change into metamorphic rocks.

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