No, the old earth plank is not dependant upon the decay rates at all. I
will show you if you will answer a couple of questions.
Do animals have time during the year long flood to build nests lay eggs and
have them hatch?
Can this be done over an over at the same site?
Before you answer remember that a 30,000 foot sedimentary cover requires
that 3.5 feet of sediment must be deposited per hour for an enitire year.
glenn
Adam, Apes and Anthropology
Foundation, Fall and Flood
& lots of creation/evolution information
http://www.isource.net/~grmorton/dmd.htm