Evidence of very recent or even present formation of oil is consistent with a young earth.
Coal is a powerful evidence for Noah's Flood; the evolutionary story of it forming from material laid down in peat bog swamps over eons of time just does not stack up.
Always the starting time of the ‘clock’ has to be assumed as well as the way in which the speed of the clock has varied over time.
Further, it has to be assumed that the clock was never disturbed.
There is no independent natural clock against which those assumptions can be tested.
It only speaks of ways in which DNA is damaged in living cells - (which fossils are clearly not).Many of these indicators for younger ages were discovered when creationist scientists started researching things that were supposed to ‘prove’ long ages.