These are just a few places to start in considering the origin and age of the earth as related to the Gensis account. Please note that I will probably not agree with everything stated on all of these websites.
For a wide range of information check Apologetics Press
Colin Patterson's address
at the American Museum of Natural History, New York City, 1981
Patterson revisits
quotation
Online edition of In the Beginning:
Compelling Evidence for Creation and the Flood (Dr. Walt Brown)
Some links on the first page to not work. To begin the book click here.
Robert E. Kofahl
Handy Dandy Evolution
Refuter
The Creation
Explanation