Question

Which rocks are considered to be the oldest types of rocks, why?

Answer 1

Sedimentary rocks are considered to be the oldest types of rocks.

Explanation:

• Sedimentary rocks are considered to be the oldest types of rocks.
• These rocks are formed by the accumulation of organic particles or minerals above the earth's surface.
• These rocks are also found in water bodies such as lakes and oceans.
• Examples of sedimentary rocks are conglomerate breccia, shale, sandstone, and silt stone.
• Flint, limestone, and dolomite are formed from chemical sedimentary rocks when dissolved and precipitated.

Answer 2

Igneous rocks are considered to be the oldest types of rocks.

Explanation:

• The oldest rocks know rock is zircon i.e 4.4 billion years old is part of sedimentary and metamorphic rocks but has origins in volcanic rock.

• It is common in earth's crust and occurs as a mineral formation in igneous rocks through the stages of primary crystallization and is resistant to heat and corrosion.

• The volcano rock is extrusive rocks and are a result of the magma reaching the surface as lavas and cooling rates of the magma or lavas produces crystals that leads to the formation of such rocks about 65% of the earth crust is made up of igneous rocks.

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• brainly.in/question/17377236 answered by Mia76.