Final answer:
Charles Hutton proposed that Earth was old and shaped slowly over time by geological processes, a concept later popularized by Charles Lyell.
Step-by-step explanation:
The geologist who proposed that Earth was old and shaped slowly over time by geological processes was Charles Hutton.
In 1795, Hutton suggested that Earth's geologic features could be explained by gradual processes that were still operating.
His ideas were later popularized by geologist Charles Lyell, who advocated for the principle of uniformitarianism and argued that the same geologic processes operating in the present had operated in the past, and at the same rate.
correct answer Charles Hutton