30 Arguments for a Young Earth
I found a website that defends thirty young-earth proofs. It presents each argument briefly and then elaborates on it at great length. I didn't read the elaborations all that closely, but the argument summaries seem compelling.
Here are some examples:
Young-earth "proof" #1: The sun is shrinking at 5 feet/hour which limits the earth-sun relationship to less than 5 million years.
Young-earth "proof" #2: Given the rate at which cosmic dust accumulates, 4.5 billion years would have produced a layer on the moon much deeper than observed. By implication, the earth is also young.
Young-earth "proof" #3: The existence of short-period comets means that the universe is less than 10,000 years old. Comets and meteoroids only last from 10,000-15,000 years before they are blown apart by the solar wind.
Young-earth "proof" #4: There are no fossil meteorites in the geologic record. If the latter were laid down over billions of years we would expect to find at least a few fossil meteorites in the geologic strata. Therefore, the geologic record was deposited rapidly.
Young-earth "proof" #5: The Moon is receding a few inches each year. Less than a million years ago the Moon would have been so close that the tides would have drowned everyone twice a day. Less than 2 or 3 million years ago the Moon would have been inside the Roche limit and, thus, destroyed.
You can read more here: http://talkorigins.org/faqs/hovind/howgood-yea.html
Q: Why didn't you address (post x) that I made in response to you nine minutes ago???
A: Because I have (a) a job, (b) familial obligations, (c) social obligations, and (d) probably a lot of other atheists responded to the same post you did, since I am practically the token Christian on this site now. Be patient, please.