General Knowledge - Chemistry - Discussion

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called Igneous rocks.

Oh! It was at utmost deep crust so came out in form of it.

Please explain volcanic eruption.

Please explain why not sedimentary rock?

The right answer is igneous rock because igneous rock are under the volcanic eruption.

Igneous rocks can be the answer because they are obtained from the molten magma.

Can fossils survive at high temperatures prevailing in igneous rocks? it can be sedimentary rocks only in which fossils be preserved.

Is one of the three main rock types, the others being sedimentary and metamorphic rock. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust.