May 23, 2022
Deep time is a concept equivalent to geological time. The modern scientific term was first used in the 18th century by the Scottish geologist James Hutton (1726–1797). This term has been used as a reference to establish the age of the Earth at 4, 54 billion years. Hutton's understanding of the term "deep time" was, in his words, crucial, philosophically and scientifically speaking. The term was later used by Charles Lyell in his Principles of Geology (1830–1833). According to some sources, this book served as an inspiration for the naturalist and evolutionary theorist Charles Darwin in terms of his theories of evolution.