How reliable is radiometric dating
Ussher accepted the Biblical account at face value, relying on the Biblical genealogies and on extant historical records.He implicitly assumed that the world was created much as it is now.These cosmogonies were part of the new emphasis of science in seeking rational explanations of the features of the world. This period was marked by a great deal of field geology rather than grand cosmogonies.It became clear that there had been significant changes in the Earth's topography over time and that these changes could neither be accounted for by natural processes operating during the brief nor by the postulated Noachian flood.It was not ruled out, per se, but it was not necessary. In the new science, however, rational explanation was desirable. In 1640 Ussher produced his famous calculation that the Earth was created in 4004 BC.In 1637 Descartes produced a cosmogony that was highly influential for more than a century. It was not in their estimates of the age of the Earth - Descartes retained the biblical date.The story of this great change in the conception of the history of Earth is not a simple one.The chronicle of this great change can be broken into five periods; ran from AD 1600-1700.
This did not matter; the theological perspective did not require physical rationalization.
The rise of science produced a major change in attitude.
In the pre-scientific world view the issue of the age of the Earth was a theological question.
Many authors choose to present the history of a complex subject by breaking it up into major threads and following the history of each thread separately.
I have chosen instead to provide a chronology of significant works and their authors with a view to providing a sense of how perspectives on Geology changed over time.