Charles Lyell's principle that the age of earth may be much older than once thought impressed upon Darwin.
<u>Explanation:</u>
Charles Lyell is one among the earlier thinkers whose studies influenced Darwin and he lived in the 1797-1875 period. while on his voyage in Beagle Darwin took the book of Charles Lyell, <em>Principles of Geology </em>with him.
In this book Lyell argues that the earth's surface was formed as a result of gradual geological processes indicating that the earth was much older than what many believed at that time.
