Seafloor Sediments Accumulate Too Fast
25 billion tons per year
Less than 12 million years to accumulate
400 meters
Less than 1 billion tons leave per year
 Subducting plate
Source: D. Russell Humphreys, Ph.D.
Rain, rivers, and wind are dumping mud from the continents into the oceans at the rate of 25 billion tons per year.
The only way known to get much mud out of the oceans is by plate tectonic subduction, seafloor sliding under continents.  But the removal rate is too slow, only about 1 billion tons per year.
  At those rates it would take only 12 million years to get the present amount of mud in the oceans.
If these processes had really been going on for the 3 billion years evolutionists allege, the seas would be chocked with dozens of kilometers of mud!
Let's summarize this dilemma ...