Consider the following statements about Igneous rocks 1 All the other types of ...........

Geography Earth Geology

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Consider the following statements about Igneous rocks.

1. All the other types of rocks are derived from igneous rocks

2. They can be formed both above and below the crustal surface with same crystalline structure

3. Compared to other types of rock forms Igneous rocks have the highest hardness.

4. Many of economically exploitable minerals are found in igneous rocks

Which of the statements mentioned above is/ are correct?

1 and 2

1 and 4

2 and 3

All of above

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Explanation:

Igneous rocks are formed from magma, the molten material from the center of the Earth. Igneous rocks begin the rock cycle, and are therefore called primary rocks. Two major divisions include volcanic or extrusive rocks that form when magma is ejected from the Earth's crust, and intrusive rocks, which are created below the surface. Major minerals present in igneous rocks include quartz, feldspars, foids, mica, augiste, hornblende, and olivine. Medium constituents include apatite, hematite, ilmenite, magnetite, natrolite, nepheline, sphene, and zircon.