Another nail in the coffin of Young Earth Creationism: Limestone formation. The rate of formation demolishes Noah's flood. [Spirituality & Religion]

Lime stone forms and deposits at a few different rates depending on temperature, water depth and conditions.
I.E. it forms fastest in warm, calm, shallow seas. Young earthers are already in trouble because the Great Flood was anything but calm, shallow or warm.

Unfortunately for young earthers, this utterly precludes the Noachian flood. The rate of precipitation is just too slow. Young earthers hold that the earth is 6000 years old and Noah's flood happened just 2400 years ago.
That's just not enough time, to account for the amount of limestone we see.

To put it in perspective, if we assume the FASTEST POSSIBLE formation rate for limestone, multiply that by TEN and then say the flood actually lasted five THOUSAND years and you still end up with .02% of the limestone we see today.

*tap tap tap*