Carbon 14 dating volcanic rock
Either the worldwide flood of Noah did not happen, or it did not create any significant disturbance in the C-12/C-14 balance at the time.
Again, if it did have an effect, it would be corrected by the calibration process.
Again, C-14 dating results on Egyptian samples before, during and after the flood were found to be accurate when the data was compared with the actual dates as independently obtained.
If there were a great deal of volcanism in the 23rd century BCE, it does not show up in the C-14 data.
"There are many lines of evidence that the radiometric dates are not the objective evidence for an old earth that many claim, and that the world is really only thousands of years old.