[Junior]

The only thing the radioactive dating assumes is that radioactive isotopes decay at specific rates. It has nothing to do with the rate sediment is layed down. Note, please, that if radioactive decay was higher in the past then life would have been impossible. Also, the various radioactive dating methods agree with one another (a cross check). You've pretty much got nothing in your complaints against scientific dating.

[longshadow]

sedimentary radioactive dating placemarker