Question

The rocks, like peat, lignite, bituminous, and anthracite, are examples of ______.

Options

• Igneous rocks

• Mechanical rocks

• Metallic rocks

• Carbonaceous rocks

Answer 1

The rocks, like peat, lignite, bituminous, and anthracite, are examples of carbonaceous rocks.

Explanation:

Peat, lignite, bituminous, and anthracite are all examples of carbonaceous rocks. These rocks are formed from the remains of plants that have been buried, compacted, and transformed over millions of years under pressure and heat. This process concentrates carbon content, making these rocks rich in carbon. They represent different stages of coal formation, with peat being the least carbon-rich and anthracite the most. Because they are derived from organic plant material and contain high levels of carbon, they are classified as carbonaceous rocks.