There are other, non-geological, evidences that point to a start (or rebirth) of the earth approximately five to ten thousand years ago, as would be the case if a global flood has occurred.

The origin of civilization is generally agreed to be in the Middle East, which is where Noah's Ark landed. The Middle East just "happens" to be a good, centrally located place from which to repopulate the world.

The oldest written materials date back five to six thousand years.

The first signs of civilization, things like pottery, agriculture, the domestication of animals, metallurgy, and the first cities are dated by secular scientists to approximately 10,000 years ago at the earliest.

The oldest known living things, the Bristlecone pine trees in California, date to about 5,000 years ago.

Study of the build up of human population makes it clear that humans have only existed for a few thousand years (not millions), even when the maximum likely effects of war, disease, disaster, and other population-reducing factors are considered.

An analysis (Whitelaw, 1979, referenced earlier) of 30,000 radiocarbon dating results published in the "Radiocarbon" journal shows an unmistakable spike in the death of living things about 5,000 years ago.