Final answer:
Two famous geologists who provided evidence of a much older Earth were Charles Lyell and James Hutton.
Step-by-step explanation:
Two famous geologists who provided evidence of a much older Earth were Charles Lyell and James Hutton. Charles Lyell, also known as the father of modern geology, argued for uniformitarianism, the idea that the same geological processes operating in the present had operated in the past. His book, Principles of Geology, became incredibly popular and had a significant impact on the scientific understanding of Earth's history. James Hutton proposed that geological change occurred gradually over long periods of time, challenging the prevailing view of catastrophic events shaping the planet.