What has the author Thomas Reginald Guise Lyell written?

You're likely thinking of Charles Lyell, not Thomas Reginald Guise Lyell. Charles Lyell was a renowned Scottish geologist who made significant contributions to the field. Here are some of his most notable works:

* Principles of Geology (1830-1833): This groundbreaking three-volume work presented the theory of uniformitarianism, arguing that geological processes happening today are the same as those that occurred in the past. This challenged the prevailing view of catastrophism, which attributed Earth's formations to sudden, dramatic events.

* Elements of Geology (1838): A more concise and accessible version of *Principles of Geology*, intended for a wider audience.

* The Antiquity of Man (1863): Lyell explored the evidence for human prehistory, challenging traditional views on the age of humanity and advocating for a much longer timeline.

Lyell's work was hugely influential, not only in geology but also in Darwin's development of the theory of evolution by natural selection.